125931719 has 2 divisors, whose sum is σ = 125931720. Its totient is φ = 125931718.

The previous prime is 125931713. The next prime is 125931721. The reversal of 125931719 is 917139521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125931719 is a prime.

It is a super-2 number, since 2×125931719² = 31717595700589922, which contains 22 as substring.

Together with 125931721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125931713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62965859 + 62965860.

It is an arithmetic number, because the mean of its divisors is an integer number (62965860).

Almost surely, 2^125931719 is an apocalyptic number.

125931719 is a deficient number, since it is larger than the sum of its proper divisors (1).

125931719 is an equidigital number, since it uses as much as digits as its factorization.

125931719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 38.

The square root of 125931719 is about 11221.9302706798. The cubic root of 125931719 is about 501.2392181394.

The spelling of 125931719 in words is "one hundred twenty-five million, nine hundred thirty-one thousand, seven hundred nineteen".