477839897 has 2 divisors, whose sum is σ = 477839898. Its totient is φ = 477839896.

The previous prime is 477839849. The next prime is 477839899. The reversal of 477839897 is 798938774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307511296 + 170328601 = 17536^2 + 13051^2 .

It is a cyclic number.

It is not a de Polignac number, because 477839897 - 2⁶ = 477839833 is a prime.

Together with 477839899, 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 (477839899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238919948 + 238919949.

It is an arithmetic number, because the mean of its divisors is an integer number (238919949).

Almost surely, 2^477839897 is an apocalyptic number.

It is an amenable number.

477839897 is a deficient number, since it is larger than the sum of its proper divisors (1).

477839897 is an equidigital number, since it uses as much as digits as its factorization.

477839897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 62.

The square root of 477839897 is about 21859.5493320425. The cubic root of 477839897 is about 781.7972456605.

The spelling of 477839897 in words is "four hundred seventy-seven million, eight hundred thirty-nine thousand, eight hundred ninety-seven".