137685644 has 12 divisors (see below), whose sum is σ = 241035144. Its totient is φ = 68818464.

The previous prime is 137685643. The next prime is 137685661. The reversal of 137685644 is 446586731.

It is a junction number, because it is equal to n+sod(n) for n = 137685595 and 137685604.

It is not an unprimeable number, because it can be changed into a prime (137685643) 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, 13967 + ... + 21689.

It is an arithmetic number, because the mean of its divisors is an integer number (20086262).

Almost surely, 2^137685644 is an apocalyptic number.

It is an amenable number.

137685644 is a deficient number, since it is larger than the sum of its proper divisors (103349500).

137685644 is a wasteful number, since it uses less digits than its factorization.

137685644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12184 (or 12182 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 137685644 is about 11733.9526162329. The cubic root of 137685644 is about 516.3722400665.

The spelling of 137685644 in words is "one hundred thirty-seven million, six hundred eighty-five thousand, six hundred forty-four".