91913671 has 2 divisors, whose sum is σ = 91913672. Its totient is φ = 91913670.

The previous prime is 91913639. The next prime is 91913753. The reversal of 91913671 is 17631919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91913671 - 2⁵ = 91913639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91913671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91913071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45956835 + 45956836.

It is an arithmetic number, because the mean of its divisors is an integer number (45956836).

Almost surely, 2^91913671 is an apocalyptic number.

91913671 is a deficient number, since it is larger than the sum of its proper divisors (1).

91913671 is an equidigital number, since it uses as much as digits as its factorization.

91913671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 37.

The square root of 91913671 is about 9587.1617802142. The cubic root of 91913671 is about 451.2944964729.

The spelling of 91913671 in words is "ninety-one million, nine hundred thirteen thousand, six hundred seventy-one".