91925657 has 2 divisors, whose sum is σ = 91925658. Its totient is φ = 91925656.

The previous prime is 91925627. The next prime is 91925663. The reversal of 91925657 is 75652919.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83978896 + 7946761 = 9164^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 91925657 - 2¹⁰ = 91924633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91925627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45962828 + 45962829.

It is an arithmetic number, because the mean of its divisors is an integer number (45962829).

Almost surely, 2^91925657 is an apocalyptic number.

It is an amenable number.

91925657 is a deficient number, since it is larger than the sum of its proper divisors (1).

91925657 is an equidigital number, since it uses as much as digits as its factorization.

91925657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 44.

The square root of 91925657 is about 9587.7868666340. The cubic root of 91925657 is about 451.3141126361.

The spelling of 91925657 in words is "ninety-one million, nine hundred twenty-five thousand, six hundred fifty-seven".