426933509 has 2 divisors, whose sum is σ = 426933510. Its totient is φ = 426933508.

The previous prime is 426933503. The next prime is 426933527. The reversal of 426933509 is 905339624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379392484 + 47541025 = 19478^2 + 6895^2 .

It is a cyclic number.

It is not a de Polignac number, because 426933509 - 2⁸ = 426933253 is a prime.

It is a super-2 number, since 2×426933509² = 364544442214106162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426933503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213466754 + 213466755.

It is an arithmetic number, because the mean of its divisors is an integer number (213466755).

Almost surely, 2^426933509 is an apocalyptic number.

It is an amenable number.

426933509 is a deficient number, since it is larger than the sum of its proper divisors (1).

426933509 is an equidigital number, since it uses as much as digits as its factorization.

426933509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 426933509 is about 20662.3693946266. The cubic root of 426933509 is about 752.9857330543.

The spelling of 426933509 in words is "four hundred twenty-six million, nine hundred thirty-three thousand, five hundred nine".