91917671 has 2 divisors, whose sum is σ = 91917672. Its totient is φ = 91917670.

The previous prime is 91917643. The next prime is 91917751. The reversal of 91917671 is 17671919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91917671 - 2⁶ = 91917607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91917971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45958835 + 45958836.

It is an arithmetic number, because the mean of its divisors is an integer number (45958836).

Almost surely, 2^91917671 is an apocalyptic number.

91917671 is a deficient number, since it is larger than the sum of its proper divisors (1).

91917671 is an equidigital number, since it uses as much as digits as its factorization.

91917671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 41.

The square root of 91917671 is about 9587.3703902582. The cubic root of 91917671 is about 451.3010430210.

The spelling of 91917671 in words is "ninety-one million, nine hundred seventeen thousand, six hundred seventy-one".