125663979 has 24 divisors (see below), whose sum is σ = 195810960. Its totient is φ = 71475264.

The previous prime is 125663959. The next prime is 125663981. The reversal of 125663979 is 979366521.

It is not a de Polignac number, because 125663979 - 2⁷ = 125663851 is a prime.

It is a super-2 number, since 2×125663979² = 31582871236224882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125663939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31797 + ... + 35529.

It is an arithmetic number, because the mean of its divisors is an integer number (8158790).

Almost surely, 2^125663979 is an apocalyptic number.

125663979 is a deficient number, since it is larger than the sum of its proper divisors (70146981).

125663979 is a wasteful number, since it uses less digits than its factorization.

125663979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979 (or 3972 counting only the distinct ones).

The product of its digits is 612360, while the sum is 48.

The square root of 125663979 is about 11209.9946030317. The cubic root of 125663979 is about 500.8837424118.

The spelling of 125663979 in words is "one hundred twenty-five million, six hundred sixty-three thousand, nine hundred seventy-nine".