247478974 has 4 divisors (see below), whose sum is σ = 371218464. Its totient is φ = 123739486.

The previous prime is 247478969. The next prime is 247478989. The reversal of 247478974 is 479874742.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×247478974² = 122491685144185352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61869742 + ... + 61869745.

It is an arithmetic number, because the mean of its divisors is an integer number (92804616).

Almost surely, 2^247478974 is an apocalyptic number.

247478974 is a deficient number, since it is larger than the sum of its proper divisors (123739490).

247478974 is a wasteful number, since it uses less digits than its factorization.

247478974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123739489.

The product of its digits is 3161088, while the sum is 52.

The square root of 247478974 is about 15731.4644582124. The cubic root of 247478974 is about 627.8358378569.

The spelling of 247478974 in words is "two hundred forty-seven million, four hundred seventy-eight thousand, nine hundred seventy-four".