125931779 has 2 divisors, whose sum is σ = 125931780. Its totient is φ = 125931778.

The previous prime is 125931761. The next prime is 125931781. The reversal of 125931779 is 977139521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125931779 - 2⁸ = 125931523 is a prime.

Together with 125931781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125931719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62965889 + 62965890.

It is an arithmetic number, because the mean of its divisors is an integer number (62965890).

Almost surely, 2^125931779 is an apocalyptic number.

125931779 is a deficient number, since it is larger than the sum of its proper divisors (1).

125931779 is an equidigital number, since it uses as much as digits as its factorization.

125931779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 44.

The square root of 125931779 is about 11221.9329440164. The cubic root of 125931779 is about 501.2392977444.

The spelling of 125931779 in words is "one hundred twenty-five million, nine hundred thirty-one thousand, seven hundred seventy-nine".