138797684 has 12 divisors (see below), whose sum is σ = 243905508. Its totient is φ = 69110400.

The previous prime is 138797651. The next prime is 138797719. The reversal of 138797684 is 486797831.

It can be written as a sum of positive squares in 2 ways, for example, as 91738084 + 47059600 = 9578^2 + 6860^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71027 + ... + 72954.

It is an arithmetic number, because the mean of its divisors is an integer number (20325459).

Almost surely, 2^138797684 is an apocalyptic number.

It is an amenable number.

138797684 is a deficient number, since it is larger than the sum of its proper divisors (105107824).

138797684 is a wasteful number, since it uses less digits than its factorization.

138797684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144226 (or 144224 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 138797684 is about 11781.2428885920. The cubic root of 138797684 is about 517.7587015853.

The spelling of 138797684 in words is "one hundred thirty-eight million, seven hundred ninety-seven thousand, six hundred eighty-four".