426320999 has 8 divisors (see below), whose sum is σ = 459276720. Its totient is φ = 393388416.

The previous prime is 426320989. The next prime is 426321011. The reversal of 426320999 is 999023624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 426320999 - 2⁸ = 426320743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426320929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61844 + ... + 68390.

It is an arithmetic number, because the mean of its divisors is an integer number (57409590).

Almost surely, 2^426320999 is an apocalyptic number.

426320999 is a deficient number, since it is larger than the sum of its proper divisors (32955721).

426320999 is a wasteful number, since it uses less digits than its factorization.

426320999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11569.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 426320999 is about 20647.5422024027. The cubic root of 426320999 is about 752.6254645972.

The spelling of 426320999 in words is "four hundred twenty-six million, three hundred twenty thousand, nine hundred ninety-nine".