137173723 has 4 divisors (see below), whose sum is σ = 139221160. Its totient is φ = 135126288.

The previous prime is 137173693. The next prime is 137173727. The reversal of 137173723 is 327371731.

137173723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327371731 = 15761 ⋅20771.

It is a cyclic number.

It is not a de Polignac number, because 137173723 - 2⁵ = 137173691 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (137173727) 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, 1023618 + ... + 1023751.

It is an arithmetic number, because the mean of its divisors is an integer number (34805290).

Almost surely, 2^137173723 is an apocalyptic number.

137173723 is a deficient number, since it is larger than the sum of its proper divisors (2047437).

137173723 is an equidigital number, since it uses as much as digits as its factorization.

137173723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047436.

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

The square root of 137173723 is about 11712.1186384018. The cubic root of 137173723 is about 515.7314807360.

The spelling of 137173723 in words is "one hundred thirty-seven million, one hundred seventy-three thousand, seven hundred twenty-three".