137988916 has 12 divisors (see below), whose sum is σ = 260056132. Its totient is φ = 63687168.

The previous prime is 137988913. The next prime is 137988919. The reversal of 137988916 is 619889731.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (137988913) and next prime (137988919).

It can be written as a sum of positive squares in 2 ways, for example, as 91011600 + 46977316 = 9540^2 + 6854^2 .

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 2653633 = 137988916 / (1 + 3 + 7 + 9 + 8 + 8 + 9 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137988913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326765 + ... + 1326868.

Almost surely, 2^137988916 is an apocalyptic number.

It is an amenable number.

137988916 is a deficient number, since it is larger than the sum of its proper divisors (122067216).

137988916 is a wasteful number, since it uses less digits than its factorization.

137988916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653650 (or 2653648 counting only the distinct ones).

The product of its digits is 653184, while the sum is 52.

The square root of 137988916 is about 11746.8683486281. The cubic root of 137988916 is about 516.7510895461.

The spelling of 137988916 in words is "one hundred thirty-seven million, nine hundred eighty-eight thousand, nine hundred sixteen".