10639631 has 2 divisors, whose sum is σ = 10639632. Its totient is φ = 10639630.

The previous prime is 10639613. The next prime is 10639633. The reversal of 10639631 is 13693601.

10639631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (10639613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10639631 - 2¹⁸ = 10377487 is a prime.

It is a super-2 number, since 2×10639631² = 226403495632322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 10639633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10639594 and 10639603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10639633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5319815 + 5319816.

It is an arithmetic number, because the mean of its divisors is an integer number (5319816).

Almost surely, 2^10639631 is an apocalyptic number.

10639631 is a deficient number, since it is larger than the sum of its proper divisors (1).

10639631 is an equidigital number, since it uses as much as digits as its factorization.

10639631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 10639631 is about 3261.8447234655. The cubic root of 10639631 is about 219.9423471519.

The spelling of 10639631 in words is "ten million, six hundred thirty-nine thousand, six hundred thirty-one".