168964139 has 12 divisors (see below), whose sum is σ = 180486528. Its totient is φ = 158140800.

The previous prime is 168964127. The next prime is 168964153. The reversal of 168964139 is 931469861.

It is not a de Polignac number, because 168964139 - 2²⁰ = 167915563 is a prime.

It is a super-2 number, since 2×168964139² = 57097760536022642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168964093 and 168964102.

It is not an unprimeable number, because it can be changed into a prime (168964189) 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, 53669 + ... + 56729.

It is an arithmetic number, because the mean of its divisors is an integer number (15040544).

Almost surely, 2^168964139 is an apocalyptic number.

168964139 is a deficient number, since it is larger than the sum of its proper divisors (11522389).

168964139 is a wasteful number, since it uses less digits than its factorization.

168964139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286 (or 3269 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 168964139 is about 12998.6206575929. The cubic root of 168964139 is about 552.8383726067.

The spelling of 168964139 in words is "one hundred sixty-eight million, nine hundred sixty-four thousand, one hundred thirty-nine".