9191664 has 40 divisors (see below), whose sum is σ = 26384720. Its totient is φ = 3063744.

The previous prime is 9191659. The next prime is 9191671. The reversal of 9191664 is 4661919.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10207 + ... + 11070.

It is an arithmetic number, because the mean of its divisors is an integer number (659618).

Almost surely, 2^9191664 is an apocalyptic number.

It is an amenable number.

9191664 is an abundant number, since it is smaller than the sum of its proper divisors (17193056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9191664 is a wasteful number, since it uses less digits than its factorization.

9191664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21294 (or 21282 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 9191664 is about 3031.7757172984. The cubic root of 9191664 is about 209.4746049878.

The spelling of 9191664 in words is "nine million, one hundred ninety-one thousand, six hundred sixty-four".