172045149 has 4 divisors (see below), whose sum is σ = 229393536. Its totient is φ = 114696764.

The previous prime is 172045147. The next prime is 172045157. The reversal of 172045149 is 941540271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172045149 - 2¹ = 172045147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172045147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28674189 + ... + 28674194.

It is an arithmetic number, because the mean of its divisors is an integer number (57348384).

Almost surely, 2^172045149 is an apocalyptic number.

It is an amenable number.

172045149 is a deficient number, since it is larger than the sum of its proper divisors (57348387).

172045149 is an equidigital number, since it uses as much as digits as its factorization.

172045149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57348386.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 172045149 is about 13116.5982251497. The cubic root of 172045149 is about 556.1784326728.

The spelling of 172045149 in words is "one hundred seventy-two million, forty-five thousand, one hundred forty-nine".