125308691 has 2 divisors, whose sum is σ = 125308692. Its totient is φ = 125308690.

The previous prime is 125308679. The next prime is 125308699. The reversal of 125308691 is 196803521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125308691 - 2²² = 121114387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125308699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62654345 + 62654346.

It is an arithmetic number, because the mean of its divisors is an integer number (62654346).

Almost surely, 2^125308691 is an apocalyptic number.

125308691 is a deficient number, since it is larger than the sum of its proper divisors (1).

125308691 is an equidigital number, since it uses as much as digits as its factorization.

125308691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 125308691 is about 11194.1364561988. The cubic root of 125308691 is about 500.4112496547.

The spelling of 125308691 in words is "one hundred twenty-five million, three hundred eight thousand, six hundred ninety-one".