79631 has 2 divisors, whose sum is σ = 79632. Its totient is φ = 79630.

The previous prime is 79627. The next prime is 79633. The reversal of 79631 is 13697.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79631 - 2² = 79627 is a prime.

It is a super-2 number, since 2×79631² = 12682192322, which contains 22 as substring.

Together with 79633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39815 + 39816.

It is an arithmetic number, because the mean of its divisors is an integer number (39816).

2⁷⁹⁶³¹ is an apocalyptic number.

79631 is a deficient number, since it is larger than the sum of its proper divisors (1).

79631 is an equidigital number, since it uses as much as digits as its factorization.

79631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 26.

The square root of 79631 is about 282.1896525389. The cubic root of 79631 is about 43.0223428145.

The spelling of 79631 in words is "seventy-nine thousand, six hundred thirty-one".