13858631 has 2 divisors, whose sum is σ = 13858632. Its totient is φ = 13858630.

The previous prime is 13858601. The next prime is 13858633. The reversal of 13858631 is 13685831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13858631 - 2⁶ = 13858567 is a prime.

It is a super-2 number, since 2×13858631² = 384123306388322, which contains 22 as substring.

Together with 13858633, 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 = 13858591 and 13858600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13858633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6929315 + 6929316.

It is an arithmetic number, because the mean of its divisors is an integer number (6929316).

Almost surely, 2^13858631 is an apocalyptic number.

13858631 is a deficient number, since it is larger than the sum of its proper divisors (1).

13858631 is an equidigital number, since it uses as much as digits as its factorization.

13858631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 13858631 is about 3722.7182273172. The cubic root of 13858631 is about 240.2002437600.

The spelling of 13858631 in words is "thirteen million, eight hundred fifty-eight thousand, six hundred thirty-one".