11389961 has 4 divisors (see below), whose sum is σ = 12425424. Its totient is φ = 10354500.

The previous prime is 11389957. The next prime is 11389979. The reversal of 11389961 is 16998311.

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.

It is a cyclic number.

It is not a de Polignac number, because 11389961 - 2² = 11389957 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11389921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517715 + ... + 517736.

It is an arithmetic number, because the mean of its divisors is an integer number (3106356).

Almost surely, 2^11389961 is an apocalyptic number.

11389961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11389961 is a deficient number, since it is larger than the sum of its proper divisors (1035463).

11389961 is a wasteful number, since it uses less digits than its factorization.

11389961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035462.

The product of its digits is 11664, while the sum is 38.

The square root of 11389961 is about 3374.9016281960. The cubic root of 11389961 is about 224.9956278986.

The spelling of 11389961 in words is "eleven million, three hundred eighty-nine thousand, nine hundred sixty-one".