137625631 has 8 divisors (see below), whose sum is σ = 161686224. Its totient is φ = 115489920.

The previous prime is 137625599. The next prime is 137625661. The reversal of 137625631 is 136526731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137625631 - 2⁵ = 137625599 is a prime.

It is a super-2 number, since 2×137625631² = 37881628616296322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137625661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481066 + ... + 481351.

It is an arithmetic number, because the mean of its divisors is an integer number (20210778).

Almost surely, 2^137625631 is an apocalyptic number.

137625631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

137625631 is a deficient number, since it is larger than the sum of its proper divisors (24060593).

137625631 is a wasteful number, since it uses less digits than its factorization.

137625631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962441.

The product of its digits is 22680, while the sum is 34.

The square root of 137625631 is about 11731.3951003280. The cubic root of 137625631 is about 516.2972054930.

The spelling of 137625631 in words is "one hundred thirty-seven million, six hundred twenty-five thousand, six hundred thirty-one".