91520263 has 2 divisors, whose sum is σ = 91520264. Its totient is φ = 91520262.

The previous prime is 91520237. The next prime is 91520267. The reversal of 91520263 is 36202519.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91520263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91520267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45760131 + 45760132.

It is an arithmetic number, because the mean of its divisors is an integer number (45760132).

Almost surely, 2^91520263 is an apocalyptic number.

91520263 is a deficient number, since it is larger than the sum of its proper divisors (1).

91520263 is an equidigital number, since it uses as much as digits as its factorization.

91520263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 91520263 is about 9566.6223401993. The cubic root of 91520263 is about 450.6497002087.

The spelling of 91520263 in words is "ninety-one million, five hundred twenty thousand, two hundred sixty-three".