137988664 has 16 divisors (see below), whose sum is σ = 282249720. Its totient is φ = 62722080.

The previous prime is 137988637. The next prime is 137988679. The reversal of 137988664 is 466889731.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783939 + ... + 784114.

Almost surely, 2^137988664 is an apocalyptic number.

It is an amenable number.

137988664 is an abundant number, since it is smaller than the sum of its proper divisors (144261056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137988664 is a wasteful number, since it uses less digits than its factorization.

137988664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568070 (or 1568066 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 137988664 is about 11746.8576223601. The cubic root of 137988664 is about 516.7507749765.

The spelling of 137988664 in words is "one hundred thirty-seven million, nine hundred eighty-eight thousand, six hundred sixty-four".