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11689000961 = 111062636451
BaseRepresentation
bin10101110001011100…
…00000000000000001
31010011121220202212112
422320232000000001
5142414341012321
65211515505105
7562443604001
oct127056000001
933147822775
1011689000961
114a59155480
122322758195
1311438b5521
147cc5c4001
154862dca5b
hex2b8b80001

11689000961 has 4 divisors (see below), whose sum is σ = 12751637424. Its totient is φ = 10626364500.

The previous prime is 11689000943. The next prime is 11689000991. The reversal of 11689000961 is 16900098611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16900098611 = 111536372601.

It is a cyclic number.

It is not a de Polignac number, because 11689000961 - 214 = 11688984577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11689000931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531318215 + ... + 531318236.

It is an arithmetic number, because the mean of its divisors is an integer number (3187909356).

It is a Proth number, since it is equal to 22295 ⋅ 219 + 1 and 22295 < 219.

Almost surely, 211689000961 is an apocalyptic number.

11689000961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11689000961 is a deficient number, since it is larger than the sum of its proper divisors (1062636463).

11689000961 is a wasteful number, since it uses less digits than its factorization.

11689000961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062636462.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 11689000961 in words is "eleven billion, six hundred eighty-nine million, nine hundred sixty-one", and thus it is an aban number.

Divisors: 1 11 1062636451 11689000961