137213173 has 4 divisors (see below), whose sum is σ = 139538880. Its totient is φ = 134887468.

The previous prime is 137213159. The next prime is 137213203. The reversal of 137213173 is 371312731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371312731 = 3037 ⋅122263.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137213173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137213113) 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, 1162765 + ... + 1162882.

It is an arithmetic number, because the mean of its divisors is an integer number (34884720).

Almost surely, 2^137213173 is an apocalyptic number.

It is an amenable number.

137213173 is a deficient number, since it is larger than the sum of its proper divisors (2325707).

137213173 is an equidigital number, since it uses as much as digits as its factorization.

137213173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325706.

The product of its digits is 2646, while the sum is 28.

The square root of 137213173 is about 11713.8026703543. The cubic root of 137213173 is about 515.7809159980.

The spelling of 137213173 in words is "one hundred thirty-seven million, two hundred thirteen thousand, one hundred seventy-three".