391109164 has 12 divisors (see below), whose sum is σ = 685584088. Its totient is φ = 195228000.

The previous prime is 391109149. The next prime is 391109183. The reversal of 391109164 is 461901193.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78942 + ... + 83749.

Almost surely, 2^391109164 is an apocalyptic number.

It is an amenable number.

391109164 is a deficient number, since it is larger than the sum of its proper divisors (294474924).

391109164 is a wasteful number, since it uses less digits than its factorization.

391109164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163296 (or 163294 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 391109164 is about 19776.4800710339. The cubic root of 391109164 is about 731.3063267396.

The spelling of 391109164 in words is "three hundred ninety-one million, one hundred nine thousand, one hundred sixty-four".