137644 has 12 divisors (see below), whose sum is σ = 259504. Its totient is φ = 63504.

The previous prime is 137639. The next prime is 137653. The reversal of 137644 is 446731.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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, 1272 + ... + 1375.

2¹³⁷⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

137644 is a deficient number, since it is larger than the sum of its proper divisors (121860).

137644 is a wasteful number, since it uses less digits than its factorization.

137644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664 (or 2662 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 137644 is about 371.0040431047. The cubic root of 137644 is about 51.6320174668.

The spelling of 137644 in words is "one hundred thirty-seven thousand, six hundred forty-four".