139838164 has 6 divisors (see below), whose sum is σ = 244716794. Its totient is φ = 69919080.

The previous prime is 139838161. The next prime is 139838191. The reversal of 139838164 is 461838931.

It can be written as a sum of positive squares in only one way, i.e., 138250564 + 1587600 = 11758^2 + 1260^2 .

It is a super-2 number, since 2×139838164² = 39109424221781792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139838164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139838161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17479767 + ... + 17479774.

Almost surely, 2^139838164 is an apocalyptic number.

It is an amenable number.

139838164 is a deficient number, since it is larger than the sum of its proper divisors (104878630).

139838164 is a wasteful number, since it uses less digits than its factorization.

139838164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34959545 (or 34959543 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 139838164 is about 11825.3187694878. The cubic root of 139838164 is about 519.0492538795.

The spelling of 139838164 in words is "one hundred thirty-nine million, eight hundred thirty-eight thousand, one hundred sixty-four".