1625113939 has 4 divisors (see below), whose sum is σ = 1625402656. Its totient is φ = 1624825224.

The previous prime is 1625113927. The next prime is 1625113943. The reversal of 1625113939 is 9393115261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1625113939 - 2²⁵ = 1591559507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625113949) 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, 135744 + ... + 147229.

It is an arithmetic number, because the mean of its divisors is an integer number (406350664).

Almost surely, 2^1625113939 is an apocalyptic number.

1625113939 is a deficient number, since it is larger than the sum of its proper divisors (288717).

1625113939 is an equidigital number, since it uses as much as digits as its factorization.

1625113939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288716.

The product of its digits is 43740, while the sum is 40.

The square root of 1625113939 is about 40312.7019560833. The cubic root of 1625113939 is about 1175.6948210359.

The spelling of 1625113939 in words is "one billion, six hundred twenty-five million, one hundred thirteen thousand, nine hundred thirty-nine".