426989831 has 4 divisors (see below), whose sum is σ = 449463000. Its totient is φ = 404516664.

The previous prime is 426989821. The next prime is 426989863. The reversal of 426989831 is 138989624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426989831 is a prime.

It is a super-2 number, since 2×426989831² = 364640631554817122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 426989831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426989821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11236556 + ... + 11236593.

It is an arithmetic number, because the mean of its divisors is an integer number (112365750).

Almost surely, 2^426989831 is an apocalyptic number.

426989831 is a deficient number, since it is larger than the sum of its proper divisors (22473169).

426989831 is a wasteful number, since it uses less digits than its factorization.

426989831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22473168.

The product of its digits is 746496, while the sum is 50.

The square root of 426989831 is about 20663.7322621060. The cubic root of 426989831 is about 753.0188434386.

The spelling of 426989831 in words is "four hundred twenty-six million, nine hundred eighty-nine thousand, eight hundred thirty-one".