125863913 has 4 divisors (see below), whose sum is σ = 143844480. Its totient is φ = 107883348.

The previous prime is 125863909. The next prime is 125863921. The reversal of 125863913 is 319368521.

It is a happy number.

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 125863913 - 2² = 125863909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125863943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8990273 + ... + 8990286.

It is an arithmetic number, because the mean of its divisors is an integer number (35961120).

Almost surely, 2^125863913 is an apocalyptic number.

It is an amenable number.

125863913 is a deficient number, since it is larger than the sum of its proper divisors (17980567).

125863913 is an equidigital number, since it uses as much as digits as its factorization.

125863913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17980566.

The product of its digits is 38880, while the sum is 38.

The square root of 125863913 is about 11218.9087258967. The cubic root of 125863913 is about 501.1492404689.

The spelling of 125863913 in words is "one hundred twenty-five million, eight hundred sixty-three thousand, nine hundred thirteen".