172299789 has 6 divisors (see below), whose sum is σ = 248877486. Its totient is φ = 114866520.

The previous prime is 172299781. The next prime is 172299797. The reversal of 172299789 is 987992271.

It is an interprime number because it is at equal distance from previous prime (172299781) and next prime (172299797).

It can be written as a sum of positive squares in only one way, i.e., 109620900 + 62678889 = 10470^2 + 7917^2 .

It is not a de Polignac number, because 172299789 - 2³ = 172299781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172299781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9572202 + ... + 9572219.

It is an arithmetic number, because the mean of its divisors is an integer number (41479581).

Almost surely, 2^172299789 is an apocalyptic number.

It is an amenable number.

172299789 is a deficient number, since it is larger than the sum of its proper divisors (76577697).

172299789 is a wasteful number, since it uses less digits than its factorization.

172299789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19144427 (or 19144424 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 172299789 is about 13126.3014211925. The cubic root of 172299789 is about 556.4526929706.

The spelling of 172299789 in words is "one hundred seventy-two million, two hundred ninety-nine thousand, seven hundred eighty-nine".