137623139 has 4 divisors (see below), whose sum is σ = 140219856. Its totient is φ = 135026424.

The previous prime is 137623127. The next prime is 137623147. The reversal of 137623139 is 931326731.

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 137623139 - 2¹² = 137619043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137623099 and 137623108.

It is not an unprimeable number, because it can be changed into a prime (137623639) 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, 1298279 + ... + 1298384.

It is an arithmetic number, because the mean of its divisors is an integer number (35054964).

Almost surely, 2^137623139 is an apocalyptic number.

137623139 is a deficient number, since it is larger than the sum of its proper divisors (2596717).

137623139 is an equidigital number, since it uses as much as digits as its factorization.

137623139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596716.

The product of its digits is 20412, while the sum is 35.

The square root of 137623139 is about 11731.2888891204. The cubic root of 137623139 is about 516.2940892604.

The spelling of 137623139 in words is "one hundred thirty-seven million, six hundred twenty-three thousand, one hundred thirty-nine".