172137137 has 8 divisors (see below), whose sum is σ = 174955296. Its totient is φ = 169326432.

The previous prime is 172137109. The next prime is 172137149. The reversal of 172137137 is 731731271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172137137 - 2¹⁰ = 172136113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172137187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62093 + ... + 64805.

It is an arithmetic number, because the mean of its divisors is an integer number (21869412).

Almost surely, 2^172137137 is an apocalyptic number.

It is an amenable number.

172137137 is a deficient number, since it is larger than the sum of its proper divisors (2818159).

172137137 is an equidigital number, since it uses as much as digits as its factorization.

172137137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727.

The product of its digits is 6174, while the sum is 32.

The square root of 172137137 is about 13120.1043059878. The cubic root of 172137137 is about 556.2775396541.

The spelling of 172137137 in words is "one hundred seventy-two million, one hundred thirty-seven thousand, one hundred thirty-seven".