91533851 has 2 divisors, whose sum is σ = 91533852. Its totient is φ = 91533850.

The previous prime is 91533847. The next prime is 91533857. The reversal of 91533851 is 15833519.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91533851 - 2² = 91533847 is a prime.

It is not a weakly prime, because it can be changed into another prime (91533857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45766925 + 45766926.

It is an arithmetic number, because the mean of its divisors is an integer number (45766926).

Almost surely, 2^91533851 is an apocalyptic number.

91533851 is a deficient number, since it is larger than the sum of its proper divisors (1).

91533851 is an equidigital number, since it uses as much as digits as its factorization.

91533851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 35.

The square root of 91533851 is about 9567.3324913478. The cubic root of 91533851 is about 450.6720017366.

The spelling of 91533851 in words is "ninety-one million, five hundred thirty-three thousand, eight hundred fifty-one".