1128704917 has 4 divisors (see below), whose sum is σ = 1136179936. Its totient is φ = 1121229900.

The previous prime is 1128704879. The next prime is 1128704923. The reversal of 1128704917 is 7194078211.

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: 7194078211 = 59 ⋅121933529.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128704917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128704917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128704957) 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, 3737283 + ... + 3737584.

It is an arithmetic number, because the mean of its divisors is an integer number (284044984).

Almost surely, 2^1128704917 is an apocalyptic number.

It is an amenable number.

1128704917 is a deficient number, since it is larger than the sum of its proper divisors (7475019).

1128704917 is an equidigital number, since it uses as much as digits as its factorization.

1128704917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7475018.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 1128704917 is about 33596.2039075846. The cubic root of 1128704917 is about 1041.1823698200.

The spelling of 1128704917 in words is "one billion, one hundred twenty-eight million, seven hundred four thousand, nine hundred seventeen".