247672317 has 4 divisors (see below), whose sum is σ = 330229760. Its totient is φ = 165114876.

The previous prime is 247672309. The next prime is 247672319. The reversal of 247672317 is 713276742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 247672317 - 2³ = 247672309 is a prime.

It is a super-2 number, since 2×247672317² = 122683153216296978, 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 (247672319) 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, 41278717 + ... + 41278722.

It is an arithmetic number, because the mean of its divisors is an integer number (82557440).

Almost surely, 2^247672317 is an apocalyptic number.

It is an amenable number.

247672317 is a deficient number, since it is larger than the sum of its proper divisors (82557443).

247672317 is an equidigital number, since it uses as much as digits as its factorization.

247672317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82557442.

The product of its digits is 98784, while the sum is 39.

The square root of 247672317 is about 15737.6083634077. The cubic root of 247672317 is about 627.9992942573. Note that the first 3 decimals are identical.

The spelling of 247672317 in words is "two hundred forty-seven million, six hundred seventy-two thousand, three hundred seventeen".