91957651 has 2 divisors, whose sum is σ = 91957652. Its totient is φ = 91957650.

The previous prime is 91957643. The next prime is 91957667. The reversal of 91957651 is 15675919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91957651 - 2³ = 91957643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91957598 and 91957607.

It is not a weakly prime, because it can be changed into another prime (91957601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45978825 + 45978826.

It is an arithmetic number, because the mean of its divisors is an integer number (45978826).

Almost surely, 2^91957651 is an apocalyptic number.

91957651 is a deficient number, since it is larger than the sum of its proper divisors (1).

91957651 is an equidigital number, since it uses as much as digits as its factorization.

91957651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 43.

The square root of 91957651 is about 9589.4551982894. The cubic root of 91957651 is about 451.3664653356.

The spelling of 91957651 in words is "ninety-one million, nine hundred fifty-seven thousand, six hundred fifty-one".