427995857 has 2 divisors, whose sum is σ = 427995858. Its totient is φ = 427995856.

The previous prime is 427995839. The next prime is 427995863. The reversal of 427995857 is 758599724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396647056 + 31348801 = 19916^2 + 5599^2 .

It is a cyclic number.

It is not a de Polignac number, because 427995857 - 2²⁰ = 426947281 is a prime.

It is not a weakly prime, because it can be changed into another prime (427995817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213997928 + 213997929.

It is an arithmetic number, because the mean of its divisors is an integer number (213997929).

Almost surely, 2^427995857 is an apocalyptic number.

It is an amenable number.

427995857 is a deficient number, since it is larger than the sum of its proper divisors (1).

427995857 is an equidigital number, since it uses as much as digits as its factorization.

427995857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 56.

The square root of 427995857 is about 20688.0607356030. The cubic root of 427995857 is about 753.6097726995.

The spelling of 427995857 in words is "four hundred twenty-seven million, nine hundred ninety-five thousand, eight hundred fifty-seven".