247972631 has 8 divisors (see below), whose sum is σ = 254963280. Its totient is φ = 240997248.

The previous prime is 247972619. The next prime is 247972657. The reversal of 247972631 is 136279742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247972631 - 2⁶ = 247972567 is a prime.

It is a super-2 number, since 2×247972631² = 122980851450124322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247972661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34415 + ... + 40991.

It is an arithmetic number, because the mean of its divisors is an integer number (31870410).

Almost surely, 2^247972631 is an apocalyptic number.

247972631 is a deficient number, since it is larger than the sum of its proper divisors (6990649).

247972631 is a wasteful number, since it uses less digits than its factorization.

247972631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633.

The product of its digits is 127008, while the sum is 41.

The square root of 247972631 is about 15747.1467574288. The cubic root of 247972631 is about 628.2530176799.

The spelling of 247972631 in words is "two hundred forty-seven million, nine hundred seventy-two thousand, six hundred thirty-one".