426631 has 2 divisors, whose sum is σ = 426632. Its totient is φ = 426630.

The previous prime is 426611. The next prime is 426637. The reversal of 426631 is 136624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 426631 - 2¹⁵ = 393863 is a prime.

It is a super-4 number, since 4×426631⁴ (a number of 24 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426637) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213315 + 213316.

It is an arithmetic number, because the mean of its divisors is an integer number (213316).

2⁴²⁶⁶³¹ is an apocalyptic number.

426631 is a deficient number, since it is larger than the sum of its proper divisors (1).

426631 is an equidigital number, since it uses as much as digits as its factorization.

426631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 426631 is about 653.1699625672. The cubic root of 426631 is about 75.2807845259.

The spelling of 426631 in words is "four hundred twenty-six thousand, six hundred thirty-one".