128925313 has 4 divisors (see below), whose sum is σ = 140645808. Its totient is φ = 117204820.

The previous prime is 128925299. The next prime is 128925337. The reversal of 128925313 is 313529821.

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 128925313 - 2⁹ = 128924801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128925343) 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, 5860231 + ... + 5860252.

It is an arithmetic number, because the mean of its divisors is an integer number (35161452).

Almost surely, 2^128925313 is an apocalyptic number.

It is an amenable number.

128925313 is a deficient number, since it is larger than the sum of its proper divisors (11720495).

128925313 is a wasteful number, since it uses less digits than its factorization.

128925313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11720494.

The product of its digits is 12960, while the sum is 34.

The square root of 128925313 is about 11354.5283037209. The cubic root of 128925313 is about 505.1799025733.

The spelling of 128925313 in words is "one hundred twenty-eight million, nine hundred twenty-five thousand, three hundred thirteen".