13988231 has 2 divisors, whose sum is σ = 13988232. Its totient is φ = 13988230.

The previous prime is 13988213. The next prime is 13988243. The reversal of 13988231 is 13288931.

Together with previous prime (13988213) 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 13988231 - 2⁶ = 13988167 is a prime.

It is a super-2 number, since 2×13988231² = 391341213018722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13988191 and 13988200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13988291) 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, 6994115 + 6994116.

It is an arithmetic number, because the mean of its divisors is an integer number (6994116).

Almost surely, 2^13988231 is an apocalyptic number.

13988231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13988231 is an equidigital number, since it uses as much as digits as its factorization.

13988231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 13988231 is about 3740.0843573374. The cubic root of 13988231 is about 240.9466718549.

The spelling of 13988231 in words is "thirteen million, nine hundred eighty-eight thousand, two hundred thirty-one".