125317717391 has 2 divisors, whose sum is σ = 125317717392. Its totient is φ = 125317717390.

The previous prime is 125317717387. The next prime is 125317717417. The reversal of 125317717391 is 193717713521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125317717391 - 2² = 125317717387 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125317717351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62658858695 + 62658858696.

It is an arithmetic number, because the mean of its divisors is an integer number (62658858696).

Almost surely, 2^125317717391 is an apocalyptic number.

125317717391 is a deficient number, since it is larger than the sum of its proper divisors (1).

125317717391 is an equidigital number, since it uses as much as digits as its factorization.

125317717391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 277830, while the sum is 47.

The spelling of 125317717391 in words is "one hundred twenty-five billion, three hundred seventeen million, seven hundred seventeen thousand, three hundred ninety-one".