137172373 has 4 divisors (see below), whose sum is σ = 147724108. Its totient is φ = 126620640.

The previous prime is 137172359. The next prime is 137172379. The reversal of 137172373 is 373271731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7963684 + 129208689 = 2822^2 + 11367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137172373 is a prime.

It is a super-2 number, since 2×137172373² = 37632519828902258, 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 (137172379) 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, 5275848 + ... + 5275873.

It is an arithmetic number, because the mean of its divisors is an integer number (36931027).

Almost surely, 2^137172373 is an apocalyptic number.

137172373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

137172373 is a deficient number, since it is larger than the sum of its proper divisors (10551735).

137172373 is a wasteful number, since it uses less digits than its factorization.

137172373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551734.

The product of its digits is 18522, while the sum is 34.

The square root of 137172373 is about 11712.0610056471. The cubic root of 137172373 is about 515.7297888673.

The spelling of 137172373 in words is "one hundred thirty-seven million, one hundred seventy-two thousand, three hundred seventy-three".