91265047 has 2 divisors, whose sum is σ = 91265048. Its totient is φ = 91265046.

The previous prime is 91265039. The next prime is 91265071. The reversal of 91265047 is 74056219.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91265047 - 2³ = 91265039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91265017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45632523 + 45632524.

It is an arithmetic number, because the mean of its divisors is an integer number (45632524).

Almost surely, 2^91265047 is an apocalyptic number.

91265047 is a deficient number, since it is larger than the sum of its proper divisors (1).

91265047 is an equidigital number, since it uses as much as digits as its factorization.

91265047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 91265047 is about 9553.2741507820. The cubic root of 91265047 is about 450.2304120439.

The spelling of 91265047 in words is "ninety-one million, two hundred sixty-five thousand, forty-seven".