470639947 has 4 divisors (see below), whose sum is σ = 479520000. Its totient is φ = 461759896.

The previous prime is 470639933. The next prime is 470639969. The reversal of 470639947 is 749936074.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-470639947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 470639947.

It is not an unprimeable number, because it can be changed into a prime (470639977) 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, 4439947 + ... + 4440052.

It is an arithmetic number, because the mean of its divisors is an integer number (119880000).

Almost surely, 2^470639947 is an apocalyptic number.

470639947 is a deficient number, since it is larger than the sum of its proper divisors (8880053).

470639947 is an equidigital number, since it uses as much as digits as its factorization.

470639947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8880052.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 470639947 is about 21694.2376450522. The cubic root of 470639947 is about 777.8507273701.

The spelling of 470639947 in words is "four hundred seventy million, six hundred thirty-nine thousand, nine hundred forty-seven".