172940139 has 12 divisors (see below), whose sum is σ = 253225336. Its totient is φ = 113713632.

The previous prime is 172940129. The next prime is 172940143. The reversal of 172940139 is 931049271.

It is not a de Polignac number, because 172940139 - 2⁵ = 172940107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172940129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130957 + ... + 132270.

Almost surely, 2^172940139 is an apocalyptic number.

172940139 is a deficient number, since it is larger than the sum of its proper divisors (80285197).

172940139 is a wasteful number, since it uses less digits than its factorization.

172940139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263306 (or 263303 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 172940139 is about 13150.6706673082. The cubic root of 172940139 is about 557.1411905557.

The spelling of 172940139 in words is "one hundred seventy-two million, nine hundred forty thousand, one hundred thirty-nine".