91635097 has 2 divisors, whose sum is σ = 91635098. Its totient is φ = 91635096.

The previous prime is 91635079. The next prime is 91635113. The reversal of 91635097 is 79053619.

Together with previous prime (91635079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 41847961 = 7056^2 + 6469^2 .

It is a cyclic number.

It is not a de Polignac number, because 91635097 - 2²³ = 83246489 is a prime.

It is not a weakly prime, because it can be changed into another prime (91635017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45817548 + 45817549.

It is an arithmetic number, because the mean of its divisors is an integer number (45817549).

Almost surely, 2^91635097 is an apocalyptic number.

It is an amenable number.

91635097 is a deficient number, since it is larger than the sum of its proper divisors (1).

91635097 is an equidigital number, since it uses as much as digits as its factorization.

91635097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 91635097 is about 9572.6222635180. The cubic root of 91635097 is about 450.8381039452.

The spelling of 91635097 in words is "ninety-one million, six hundred thirty-five thousand, ninety-seven".