91132507 has 2 divisors, whose sum is σ = 91132508. Its totient is φ = 91132506.

The previous prime is 91132499. The next prime is 91132511. The reversal of 91132507 is 70523119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91132507 - 2³ = 91132499 is a prime.

It is not a weakly prime, because it can be changed into another prime (91132807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45566253 + 45566254.

It is an arithmetic number, because the mean of its divisors is an integer number (45566254).

Almost surely, 2^91132507 is an apocalyptic number.

91132507 is a deficient number, since it is larger than the sum of its proper divisors (1).

91132507 is an equidigital number, since it uses as much as digits as its factorization.

91132507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 91132507 is about 9546.3347416692. The cubic root of 91132507 is about 450.0123568623.

The spelling of 91132507 in words is "ninety-one million, one hundred thirty-two thousand, five hundred seven".