476447987 has 2 divisors, whose sum is σ = 476447988. Its totient is φ = 476447986.

The previous prime is 476447981. The next prime is 476447999. The reversal of 476447987 is 789744674.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 476447987 - 2⁸ = 476447731 is a prime.

It is not a weakly prime, because it can be changed into another prime (476447981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238223993 + 238223994.

It is an arithmetic number, because the mean of its divisors is an integer number (238223994).

Almost surely, 2^476447987 is an apocalyptic number.

476447987 is a deficient number, since it is larger than the sum of its proper divisors (1).

476447987 is an equidigital number, since it uses as much as digits as its factorization.

476447987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9483264, while the sum is 56.

The square root of 476447987 is about 21827.6885400172. The cubic root of 476447987 is about 781.0374027860.

The spelling of 476447987 in words is "four hundred seventy-six million, four hundred forty-seven thousand, nine hundred eighty-seven".