172422639 has 12 divisors (see below), whose sum is σ = 249717000. Its totient is φ = 114642864.

The previous prime is 172422629. The next prime is 172422673. The reversal of 172422639 is 936224271.

172422639 is a `hidden beast` number, since 17 + 2 + 4 + 2 + 2 + 639 = 666.

It is not a de Polignac number, because 172422639 - 2¹³ = 172414447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172422629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21864 + ... + 28685.

It is an arithmetic number, because the mean of its divisors is an integer number (20809750).

Almost surely, 2^172422639 is an apocalyptic number.

172422639 is a deficient number, since it is larger than the sum of its proper divisors (77294361).

172422639 is a wasteful number, since it uses less digits than its factorization.

172422639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50934 (or 50931 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 172422639 is about 13130.9801233571. The cubic root of 172422639 is about 556.5849120777.

It can be divided in two parts, 17242 and 2639, that added together give a square (19881 = 141²).

The spelling of 172422639 in words is "one hundred seventy-two million, four hundred twenty-two thousand, six hundred thirty-nine".