247471994 has 32 divisors (see below), whose sum is σ = 464054400. Its totient is φ = 96157440.

The previous prime is 247471963. The next prime is 247472033. The reversal of 247471994 is 499174742.

It is a happy number.

It is a super-2 number, since 2×247471994² = 122484775628672072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61022 + ... + 64950.

It is an arithmetic number, because the mean of its divisors is an integer number (14501700).

Almost surely, 2^247471994 is an apocalyptic number.

247471994 is a deficient number, since it is larger than the sum of its proper divisors (216582406).

247471994 is a wasteful number, since it uses less digits than its factorization.

247471994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358.

The product of its digits is 508032, while the sum is 47.

The square root of 247471994 is about 15731.2426082621. The cubic root of 247471994 is about 627.8299352203.

The spelling of 247471994 in words is "two hundred forty-seven million, four hundred seventy-one thousand, nine hundred ninety-four".