426646631 has 4 divisors (see below), whose sum is σ = 426867264. Its totient is φ = 426426000.

The previous prime is 426646621. The next prime is 426646663. The reversal of 426646631 is 136646624.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 426646631 - 2¹⁴ = 426630247 is a prime.

It is a super-2 number, since 2×426646631² = 364054695487300322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426646621) 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, 107390 + ... + 111291.

It is an arithmetic number, because the mean of its divisors is an integer number (106716816).

Almost surely, 2^426646631 is an apocalyptic number.

426646631 is a deficient number, since it is larger than the sum of its proper divisors (220633).

426646631 is a wasteful number, since it uses less digits than its factorization.

426646631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220632.

The product of its digits is 124416, while the sum is 38.

The square root of 426646631 is about 20655.4261878084. The cubic root of 426646631 is about 752.8170389927.

The spelling of 426646631 in words is "four hundred twenty-six million, six hundred forty-six thousand, six hundred thirty-one".