427995817 has 2 divisors, whose sum is σ = 427995818. Its totient is φ = 427995816.

The previous prime is 427995779. The next prime is 427995823. The reversal of 427995817 is 718599724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301230736 + 126765081 = 17356^2 + 11259^2 .

It is a cyclic number.

It is not a de Polignac number, because 427995817 - 2¹⁹ = 427471529 is a prime.

It is not a weakly prime, because it can be changed into another prime (427995857) 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, 213997908 + 213997909.

It is an arithmetic number, because the mean of its divisors is an integer number (213997909).

Almost surely, 2^427995817 is an apocalyptic number.

It is an amenable number.

427995817 is a deficient number, since it is larger than the sum of its proper divisors (1).

427995817 is an equidigital number, since it uses as much as digits as its factorization.

427995817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 52.

The square root of 427995817 is about 20688.0597688618. The cubic root of 427995817 is about 753.6097492223.

The spelling of 427995817 in words is "four hundred twenty-seven million, nine hundred ninety-five thousand, eight hundred seventeen".