654972172 has 6 divisors (see below), whose sum is σ = 1146201308. Its totient is φ = 327486084.

The previous prime is 654972169. The next prime is 654972179. The reversal of 654972172 is 271279456.

It is not an unprimeable number, because it can be changed into a prime (654972179) 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 as a sum of consecutive naturals, namely, 81871518 + ... + 81871525.

Almost surely, 2^654972172 is an apocalyptic number.

It is an amenable number.

654972172 is a deficient number, since it is larger than the sum of its proper divisors (491229136).

654972172 is a wasteful number, since it uses less digits than its factorization.

654972172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163743047 (or 163743045 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 654972172 is about 25592.4241133973. The cubic root of 654972172 is about 868.4422611899.

The spelling of 654972172 in words is "six hundred fifty-four million, nine hundred seventy-two thousand, one hundred seventy-two".