426266591 has 2 divisors, whose sum is σ = 426266592. Its totient is φ = 426266590.

The previous prime is 426266587. The next prime is 426266629. The reversal of 426266591 is 195662624.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 426266591 - 2² = 426266587 is a prime.

It is a super-2 number, since 2×426266591² = 363406413205522562, which contains 22 as substring.

It is a Sophie Germain 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 (426266531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213133295 + 213133296.

It is an arithmetic number, because the mean of its divisors is an integer number (213133296).

Almost surely, 2^426266591 is an apocalyptic number.

426266591 is a deficient number, since it is larger than the sum of its proper divisors (1).

426266591 is an equidigital number, since it uses as much as digits as its factorization.

426266591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 426266591 is about 20646.2246185592. The cubic root of 426266591 is about 752.5934460098.

The spelling of 426266591 in words is "four hundred twenty-six million, two hundred sixty-six thousand, five hundred ninety-one".