91667501 has 2 divisors, whose sum is σ = 91667502. Its totient is φ = 91667500.

The previous prime is 91667497. The next prime is 91667549. The reversal of 91667501 is 10576619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56265001 + 35402500 = 7501^2 + 5950^2 .

It is a cyclic number.

It is not a de Polignac number, because 91667501 - 2² = 91667497 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91667551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45833750 + 45833751.

It is an arithmetic number, because the mean of its divisors is an integer number (45833751).

Almost surely, 2^91667501 is an apocalyptic number.

It is an amenable number.

91667501 is a deficient number, since it is larger than the sum of its proper divisors (1).

91667501 is an equidigital number, since it uses as much as digits as its factorization.

91667501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 91667501 is about 9574.3146491015. The cubic root of 91667501 is about 450.8912394676.

The spelling of 91667501 in words is "ninety-one million, six hundred sixty-seven thousand, five hundred one".