473666721 has 12 divisors (see below), whose sum is σ = 694189776. Its totient is φ = 287070520.

The previous prime is 473666717. The next prime is 473666723. The reversal of 473666721 is 127666374.

It is a happy number.

It is not a de Polignac number, because 473666721 - 2² = 473666717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (473666723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 652071 + ... + 652796.

It is an arithmetic number, because the mean of its divisors is an integer number (57849148).

Almost surely, 2^473666721 is an apocalyptic number.

It is an amenable number.

473666721 is a deficient number, since it is larger than the sum of its proper divisors (220523055).

473666721 is a wasteful number, since it uses less digits than its factorization.

473666721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304892 (or 1304881 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The square root of 473666721 is about 21763.8857054525. The cubic root of 473666721 is about 779.5146668482.

The spelling of 473666721 in words is "four hundred seventy-three million, six hundred sixty-six thousand, seven hundred twenty-one".