137621031 has 4 divisors (see below), whose sum is σ = 183494712. Its totient is φ = 91747352.

The previous prime is 137621017. The next prime is 137621053. The reversal of 137621031 is 130126731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137621031 - 2⁵ = 137620999 is a prime.

It is a super-2 number, since 2×137621031² = 37879096347005922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 137620992 and 137621010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137621531) 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, 22936836 + ... + 22936841.

It is an arithmetic number, because the mean of its divisors is an integer number (45873678).

Almost surely, 2^137621031 is an apocalyptic number.

137621031 is a deficient number, since it is larger than the sum of its proper divisors (45873681).

137621031 is an equidigital number, since it uses as much as digits as its factorization.

137621031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45873680.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 137621031 is about 11731.1990435761. The cubic root of 137621031 is about 516.2914531885.

Adding to 137621031 its reverse (130126731), we get a palindrome (267747762).

The spelling of 137621031 in words is "one hundred thirty-seven million, six hundred twenty-one thousand, thirty-one".