476471993 has 4 divisors (see below), whose sum is σ = 477098868. Its totient is φ = 475845120.

The previous prime is 476471981. The next prime is 476472011. The reversal of 476471993 is 399174674.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85895824 + 390576169 = 9268^2 + 19763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-476471993 is a prime.

It is a super-2 number, since 2×476471993² = 454051120226784098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (476470993) 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, 312296 + ... + 313817.

It is an arithmetic number, because the mean of its divisors is an integer number (119274717).

Almost surely, 2^476471993 is an apocalyptic number.

It is an amenable number.

476471993 is a deficient number, since it is larger than the sum of its proper divisors (626875).

476471993 is an equidigital number, since it uses as much as digits as its factorization.

476471993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626874.

The product of its digits is 1143072, while the sum is 50.

The square root of 476471993 is about 21828.2384309866. The cubic root of 476471993 is about 781.0505201807.

The spelling of 476471993 in words is "four hundred seventy-six million, four hundred seventy-one thousand, nine hundred ninety-three".