172980139 has 2 divisors, whose sum is σ = 172980140. Its totient is φ = 172980138.

The previous prime is 172980127. The next prime is 172980193. The reversal of 172980139 is 931089271.

Together with next prime (172980193) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172980139 - 2⁹ = 172979627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172980839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86490069 + 86490070.

It is an arithmetic number, because the mean of its divisors is an integer number (86490070).

Almost surely, 2^172980139 is an apocalyptic number.

172980139 is a deficient number, since it is larger than the sum of its proper divisors (1).

172980139 is an equidigital number, since it uses as much as digits as its factorization.

172980139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 172980139 is about 13152.1914143613. The cubic root of 172980139 is about 557.1841416982.

The spelling of 172980139 in words is "one hundred seventy-two million, nine hundred eighty thousand, one hundred thirty-nine".