426665117 has 2 divisors, whose sum is σ = 426665118. Its totient is φ = 426665116.

The previous prime is 426665101. The next prime is 426665123. The reversal of 426665117 is 711566624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376127236 + 50537881 = 19394^2 + 7109^2 .

It is a cyclic number.

It is not a de Polignac number, because 426665117 - 2⁴ = 426665101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426665137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213332558 + 213332559.

It is an arithmetic number, because the mean of its divisors is an integer number (213332559).

Almost surely, 2^426665117 is an apocalyptic number.

It is an amenable number.

426665117 is a deficient number, since it is larger than the sum of its proper divisors (1).

426665117 is an equidigital number, since it uses as much as digits as its factorization.

426665117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 426665117 is about 20655.8736682814. The cubic root of 426665117 is about 752.8279116711.

The spelling of 426665117 in words is "four hundred twenty-six million, six hundred sixty-five thousand, one hundred seventeen".