426311621 has 4 divisors (see below), whose sum is σ = 426375852. Its totient is φ = 426247392.

The previous prime is 426311603. The next prime is 426311623. The reversal of 426311621 is 126113624.

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

It can be written as a sum of positive squares in 2 ways, for example, as 350812900 + 75498721 = 18730^2 + 8689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426311621 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 (426311623) 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, 20840 + ... + 35873.

It is an arithmetic number, because the mean of its divisors is an integer number (106593963).

Almost surely, 2^426311621 is an apocalyptic number.

It is an amenable number.

426311621 is a deficient number, since it is larger than the sum of its proper divisors (64231).

426311621 is an equidigital number, since it uses as much as digits as its factorization.

426311621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64230.

The product of its digits is 1728, while the sum is 26.

The square root of 426311621 is about 20647.3151039064. The cubic root of 426311621 is about 752.6199459282.

The spelling of 426311621 in words is "four hundred twenty-six million, three hundred eleven thousand, six hundred twenty-one".