172139014 has 4 divisors (see below), whose sum is σ = 258208524. Its totient is φ = 86069506.

The previous prime is 172138999. The next prime is 172139053. The reversal of 172139014 is 410931271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 410931271 = 23 ⋅17866577.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43034752 + ... + 43034755.

It is an arithmetic number, because the mean of its divisors is an integer number (64552131).

Almost surely, 2^172139014 is an apocalyptic number.

172139014 is a deficient number, since it is larger than the sum of its proper divisors (86069510).

172139014 is an equidigital number, since it uses as much as digits as its factorization.

172139014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86069509.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 172139014 is about 13120.1758372363. The cubic root of 172139014 is about 556.2795615481.

The spelling of 172139014 in words is "one hundred seventy-two million, one hundred thirty-nine thousand, fourteen".