91875863 has 2 divisors, whose sum is σ = 91875864. Its totient is φ = 91875862.

The previous prime is 91875851. The next prime is 91875877. The reversal of 91875863 is 36857819.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91875863 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 (91875263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45937931 + 45937932.

It is an arithmetic number, because the mean of its divisors is an integer number (45937932).

Almost surely, 2^91875863 is an apocalyptic number.

91875863 is a deficient number, since it is larger than the sum of its proper divisors (1).

91875863 is an equidigital number, since it uses as much as digits as its factorization.

91875863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 91875863 is about 9585.1897738125. The cubic root of 91875863 is about 451.2326091164.

The spelling of 91875863 in words is "ninety-one million, eight hundred seventy-five thousand, eight hundred sixty-three".