476513981 has 2 divisors, whose sum is σ = 476513982. Its totient is φ = 476513980.

The previous prime is 476513971. The next prime is 476513987. The reversal of 476513981 is 189315674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390655225 + 85858756 = 19765^2 + 9266^2 .

It is a cyclic number.

It is not a de Polignac number, because 476513981 - 2¹⁴ = 476497597 is a prime.

It is a super-2 number, since 2×476513981² = 454131148176936722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (476513987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238256990 + 238256991.

It is an arithmetic number, because the mean of its divisors is an integer number (238256991).

Almost surely, 2^476513981 is an apocalyptic number.

It is an amenable number.

476513981 is a deficient number, since it is larger than the sum of its proper divisors (1).

476513981 is an equidigital number, since it uses as much as digits as its factorization.

476513981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 476513981 is about 21829.2001914866. The cubic root of 476513981 is about 781.0734622679.

The spelling of 476513981 in words is "four hundred seventy-six million, five hundred thirteen thousand, nine hundred eighty-one".