91853864 has 16 divisors (see below), whose sum is σ = 173807700. Its totient is φ = 45505152.

The previous prime is 91853849. The next prime is 91853887. The reversal of 91853864 is 46835819.

It can be written as a sum of positive squares in 2 ways, for example, as 75516100 + 16337764 = 8690^2 + 4042^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51797 + ... + 53540.

Almost surely, 2^91853864 is an apocalyptic number.

It is an amenable number.

91853864 is a deficient number, since it is larger than the sum of its proper divisors (81953836).

91853864 is a wasteful number, since it uses less digits than its factorization.

91853864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105452 (or 105448 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 91853864 is about 9584.0421534966. The cubic root of 91853864 is about 451.1965914645.

The spelling of 91853864 in words is "ninety-one million, eight hundred fifty-three thousand, eight hundred sixty-four".