91364731 has 2 divisors, whose sum is σ = 91364732. Its totient is φ = 91364730.

The previous prime is 91364699. The next prime is 91364759. The reversal of 91364731 is 13746319.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91364731 - 2⁵ = 91364699 is a prime.

It is a super-2 number, since 2×91364731² = 16695028141404722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91364131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45682365 + 45682366.

It is an arithmetic number, because the mean of its divisors is an integer number (45682366).

Almost surely, 2^91364731 is an apocalyptic number.

91364731 is a deficient number, since it is larger than the sum of its proper divisors (1).

91364731 is an equidigital number, since it uses as much as digits as its factorization.

91364731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 91364731 is about 9558.4899958100. The cubic root of 91364731 is about 450.3942733814.

The spelling of 91364731 in words is "ninety-one million, three hundred sixty-four thousand, seven hundred thirty-one".