247172924 has 12 divisors (see below), whose sum is σ = 434410704. Its totient is φ = 123055584.

The previous prime is 247172903. The next prime is 247172929. The reversal of 247172924 is 429271742.

It is a super-2 number, since 2×247172924² = 122188908717419552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247172929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131672 + ... + 133535.

It is an arithmetic number, because the mean of its divisors is an integer number (36200892).

Almost surely, 2^247172924 is an apocalyptic number.

It is an amenable number.

247172924 is a deficient number, since it is larger than the sum of its proper divisors (187237780).

247172924 is a wasteful number, since it uses less digits than its factorization.

247172924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265444 (or 265442 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 247172924 is about 15721.7341282697. The cubic root of 247172924 is about 627.5769223648.

The spelling of 247172924 in words is "two hundred forty-seven million, one hundred seventy-two thousand, nine hundred twenty-four".