13807831 has 2 divisors, whose sum is σ = 13807832. Its totient is φ = 13807830.

The previous prime is 13807823. The next prime is 13807837. The reversal of 13807831 is 13870831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13807831 - 2³ = 13807823 is a prime.

It is a super-2 number, since 2×13807831² = 381312393849122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13807793 and 13807802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13807837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6903915 + 6903916.

It is an arithmetic number, because the mean of its divisors is an integer number (6903916).

Almost surely, 2^13807831 is an apocalyptic number.

13807831 is a deficient number, since it is larger than the sum of its proper divisors (1).

13807831 is an equidigital number, since it uses as much as digits as its factorization.

13807831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 13807831 is about 3715.8889918834. Note that the first 3 decimals coincide. The cubic root of 13807831 is about 239.9063928934.

The spelling of 13807831 in words is "thirteen million, eight hundred seven thousand, eight hundred thirty-one".