325128929 has 4 divisors (see below), whose sum is σ = 325316784. Its totient is φ = 324941076.

The previous prime is 325128913. The next prime is 325128941. The reversal of 325128929 is 929821523.

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 325128929 - 2⁴ = 325128913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325128949) 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, 91307 + ... + 94800.

It is an arithmetic number, because the mean of its divisors is an integer number (81329196).

Almost surely, 2^325128929 is an apocalyptic number.

It is an amenable number.

325128929 is a deficient number, since it is larger than the sum of its proper divisors (187855).

325128929 is a wasteful number, since it uses less digits than its factorization.

325128929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187854.

The product of its digits is 77760, while the sum is 41.

The square root of 325128929 is about 18031.3318698315. The cubic root of 325128929 is about 687.6253375451.

The spelling of 325128929 in words is "three hundred twenty-five million, one hundred twenty-eight thousand, nine hundred twenty-nine".