172090149 has 32 divisors (see below), whose sum is σ = 287232000. Its totient is φ = 89035200.

The previous prime is 172090141. The next prime is 172090151. The reversal of 172090149 is 941090271.

It is not a de Polignac number, because 172090149 - 2³ = 172090141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172090141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61227 + ... + 63975.

It is an arithmetic number, because the mean of its divisors is an integer number (8976000).

Almost surely, 2^172090149 is an apocalyptic number.

It is an amenable number.

172090149 is a deficient number, since it is larger than the sum of its proper divisors (115141851).

172090149 is a wasteful number, since it uses less digits than its factorization.

172090149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 172090149 is about 13118.3134967876. The cubic root of 172090149 is about 556.2269196500.

The spelling of 172090149 in words is "one hundred seventy-two million, ninety thousand, one hundred forty-nine".