91893764 has 6 divisors (see below), whose sum is σ = 160814094. Its totient is φ = 45946880.

The previous prime is 91893761. The next prime is 91893773. The reversal of 91893764 is 46739819.

It can be written as a sum of positive squares in only one way, i.e., 54169600 + 37724164 = 7360^2 + 6142^2 .

It is not an unprimeable number, because it can be changed into a prime (91893761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11486717 + ... + 11486724.

It is an arithmetic number, because the mean of its divisors is an integer number (26802349).

Almost surely, 2^91893764 is an apocalyptic number.

It is an amenable number.

91893764 is a deficient number, since it is larger than the sum of its proper divisors (68920330).

91893764 is a wasteful number, since it uses less digits than its factorization.

91893764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22973445 (or 22973443 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 91893764 is about 9586.1235126614. The cubic root of 91893764 is about 451.2619131146.

The spelling of 91893764 in words is "ninety-one million, eight hundred ninety-three thousand, seven hundred sixty-four".