477287989 has 2 divisors, whose sum is σ = 477287990. Its totient is φ = 477287988.

The previous prime is 477287981. The next prime is 477288013. The reversal of 477287989 is 989782774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474499089 + 2788900 = 21783^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 477287989 - 2³ = 477287981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (477287981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238643994 + 238643995.

It is an arithmetic number, because the mean of its divisors is an integer number (238643995).

Almost surely, 2^477287989 is an apocalyptic number.

It is an amenable number.

477287989 is a deficient number, since it is larger than the sum of its proper divisors (1).

477287989 is an equidigital number, since it uses as much as digits as its factorization.

477287989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14224896, while the sum is 61.

The square root of 477287989 is about 21846.9217282435. The cubic root of 477287989 is about 781.4961361715.

The spelling of 477287989 in words is "four hundred seventy-seven million, two hundred eighty-seven thousand, nine hundred eighty-nine".