47979172 has 6 divisors (see below), whose sum is σ = 83963558. Its totient is φ = 23989584.

The previous prime is 47979157. The next prime is 47979179. The reversal of 47979172 is 27197974.

It can be written as a sum of positive squares in only one way, i.e., 25644096 + 22335076 = 5064^2 + 4726^2 .

It is not an unprimeable number, because it can be changed into a prime (47979179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5997393 + ... + 5997400.

Almost surely, 2^47979172 is an apocalyptic number.

It is an amenable number.

47979172 is a deficient number, since it is larger than the sum of its proper divisors (35984386).

47979172 is a wasteful number, since it uses less digits than its factorization.

47979172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994797 (or 11994795 counting only the distinct ones).

The product of its digits is 222264, while the sum is 46.

The square root of 47979172 is about 6926.6999357558. The cubic root of 47979172 is about 363.3715457009.

The spelling of 47979172 in words is "forty-seven million, nine hundred seventy-nine thousand, one hundred seventy-two".