172690039 has 2 divisors, whose sum is σ = 172690040. Its totient is φ = 172690038.

The previous prime is 172690033. The next prime is 172690043. The reversal of 172690039 is 930096271.

172690039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172690039 - 2¹⁹ = 172165751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172690033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86345019 + 86345020.

It is an arithmetic number, because the mean of its divisors is an integer number (86345020).

Almost surely, 2^172690039 is an apocalyptic number.

172690039 is a deficient number, since it is larger than the sum of its proper divisors (1).

172690039 is an equidigital number, since it uses as much as digits as its factorization.

172690039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 172690039 is about 13141.1582061856. The cubic root of 172690039 is about 556.8724882625.

The spelling of 172690039 in words is "one hundred seventy-two million, six hundred ninety thousand, thirty-nine".