426640583 has 2 divisors, whose sum is σ = 426640584. Its totient is φ = 426640582.

The previous prime is 426640567. The next prime is 426640603. The reversal of 426640583 is 385046624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 426640583 - 2⁴ = 426640567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426640553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213320291 + 213320292.

It is an arithmetic number, because the mean of its divisors is an integer number (213320292).

Almost surely, 2^426640583 is an apocalyptic number.

426640583 is a deficient number, since it is larger than the sum of its proper divisors (1).

426640583 is an equidigital number, since it uses as much as digits as its factorization.

426640583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 426640583 is about 20655.2797850816. The cubic root of 426640583 is about 752.8134817484.

The spelling of 426640583 in words is "four hundred twenty-six million, six hundred forty thousand, five hundred eighty-three".