164907391 has 12 divisors (see below), whose sum is σ = 182001456. Its totient is φ = 149304320.

The previous prime is 164907367. The next prime is 164907397. The reversal of 164907391 is 193709461.

It is not a de Polignac number, because 164907391 - 2⁵ = 164907359 is a prime.

It is a super-3 number, since 3×164907391³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164907397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28446 + ... + 33748.

It is an arithmetic number, because the mean of its divisors is an integer number (15166788).

Almost surely, 2^164907391 is an apocalyptic number.

164907391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164907391 is a deficient number, since it is larger than the sum of its proper divisors (17094065).

164907391 is a wasteful number, since it uses less digits than its factorization.

164907391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582 (or 5571 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 164907391 is about 12841.6272722736. The cubic root of 164907391 is about 548.3780214028.

The spelling of 164907391 in words is "one hundred sixty-four million, nine hundred seven thousand, three hundred ninety-one".