426991529 has 2 divisors, whose sum is σ = 426991530. Its totient is φ = 426991528.

The previous prime is 426991519. The next prime is 426991559. The reversal of 426991529 is 925199624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403206400 + 23785129 = 20080^2 + 4877^2 .

It is a cyclic number.

It is not a de Polignac number, because 426991529 - 2²⁰ = 425942953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426991519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213495764 + 213495765.

It is an arithmetic number, because the mean of its divisors is an integer number (213495765).

Almost surely, 2^426991529 is an apocalyptic number.

It is an amenable number.

426991529 is a deficient number, since it is larger than the sum of its proper divisors (1).

426991529 is an equidigital number, since it uses as much as digits as its factorization.

426991529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 426991529 is about 20663.7733485441. The cubic root of 426991529 is about 753.0198416078.

The spelling of 426991529 in words is "four hundred twenty-six million, nine hundred ninety-one thousand, five hundred twenty-nine".