477790681 has 2 divisors, whose sum is σ = 477790682. Its totient is φ = 477790680.

The previous prime is 477790679. The next prime is 477790717. The reversal of 477790681 is 186097774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293265625 + 184525056 = 17125^2 + 13584^2 .

It is a cyclic number.

It is not a de Polignac number, because 477790681 - 2¹ = 477790679 is a prime.

It is a super-2 number, since 2×477790681² = 456567869700887522, which contains 22 as substring.

Together with 477790679, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (477790381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238895340 + 238895341.

It is an arithmetic number, because the mean of its divisors is an integer number (238895341).

Almost surely, 2^477790681 is an apocalyptic number.

It is an amenable number.

477790681 is a deficient number, since it is larger than the sum of its proper divisors (1).

477790681 is an equidigital number, since it uses as much as digits as its factorization.

477790681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 477790681 is about 21858.4235707884. The cubic root of 477790681 is about 781.7704038567.

The spelling of 477790681 in words is "four hundred seventy-seven million, seven hundred ninety thousand, six hundred eighty-one".