128902957 has 4 divisors (see below), whose sum is σ = 130534720. Its totient is φ = 127271196.

The previous prime is 128902937. The next prime is 128902997. The reversal of 128902957 is 759209821.

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 128902957 - 2²³ = 120514349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128902927) 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, 815763 + ... + 815920.

It is an arithmetic number, because the mean of its divisors is an integer number (32633680).

Almost surely, 2^128902957 is an apocalyptic number.

It is an amenable number.

128902957 is a deficient number, since it is larger than the sum of its proper divisors (1631763).

128902957 is an equidigital number, since it uses as much as digits as its factorization.

128902957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631762.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 128902957 is about 11353.5438079923. The cubic root of 128902957 is about 505.1507010289.

The spelling of 128902957 in words is "one hundred twenty-eight million, nine hundred two thousand, nine hundred fifty-seven".