172742992 has 10 divisors (see below), whose sum is σ = 334689578. Its totient is φ = 86371488.

The previous prime is 172742989. The next prime is 172742993. The reversal of 172742992 is 299247271.

It can be written as a sum of positive squares in only one way, i.e., 124634896 + 48108096 = 11164^2 + 6936^2 .

It is a super-2 number, since 2×172742992² = 59680282570224128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172742993) 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 as a sum of consecutive naturals, namely, 5398203 + ... + 5398234.

Almost surely, 2^172742992 is an apocalyptic number.

It is an amenable number.

172742992 is a deficient number, since it is larger than the sum of its proper divisors (161946586).

172742992 is a wasteful number, since it uses less digits than its factorization.

172742992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10796445 (or 10796439 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 172742992 is about 13143.1728285068. The cubic root of 172742992 is about 556.9294015150.

The spelling of 172742992 in words is "one hundred seventy-two million, seven hundred forty-two thousand, nine hundred ninety-two".