472778287 has 2 divisors, whose sum is σ = 472778288. Its totient is φ = 472778286.

The previous prime is 472778281. The next prime is 472778309. The reversal of 472778287 is 782877274.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-472778287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472778281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236389143 + 236389144.

It is an arithmetic number, because the mean of its divisors is an integer number (236389144).

Almost surely, 2^472778287 is an apocalyptic number.

472778287 is a deficient number, since it is larger than the sum of its proper divisors (1).

472778287 is an equidigital number, since it uses as much as digits as its factorization.

472778287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2458624, while the sum is 52.

The square root of 472778287 is about 21743.4653861798. The cubic root of 472778287 is about 779.0269957023.

The spelling of 472778287 in words is "four hundred seventy-two million, seven hundred seventy-eight thousand, two hundred eighty-seven".