476683721 has 2 divisors, whose sum is σ = 476683722. Its totient is φ = 476683720.

The previous prime is 476683693. The next prime is 476683771. The reversal of 476683721 is 127386674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436183225 + 40500496 = 20885^2 + 6364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-476683721 is a prime.

It is not a weakly prime, because it can be changed into another prime (476683771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238341860 + 238341861.

It is an arithmetic number, because the mean of its divisors is an integer number (238341861).

Almost surely, 2^476683721 is an apocalyptic number.

It is an amenable number.

476683721 is a deficient number, since it is larger than the sum of its proper divisors (1).

476683721 is an equidigital number, since it uses as much as digits as its factorization.

476683721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The square root of 476683721 is about 21833.0877568886. The cubic root of 476683721 is about 781.1661938391.

The spelling of 476683721 in words is "four hundred seventy-six million, six hundred eighty-three thousand, seven hundred twenty-one".