13931069 has 2 divisors, whose sum is σ = 13931070. Its totient is φ = 13931068.

The previous prime is 13931039. The next prime is 13931087. The reversal of 13931069 is 96013931.

13931069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12687844 + 1243225 = 3562^2 + 1115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13931069 is a prime.

It is a super-2 number, since 2×13931069² = 388149366965522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13931039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6965534 + 6965535.

It is an arithmetic number, because the mean of its divisors is an integer number (6965535).

Almost surely, 2^13931069 is an apocalyptic number.

It is an amenable number.

13931069 is a deficient number, since it is larger than the sum of its proper divisors (1).

13931069 is an equidigital number, since it uses as much as digits as its factorization.

13931069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 13931069 is about 3732.4347281634. The cubic root of 13931069 is about 240.6180194523.

The spelling of 13931069 in words is "thirteen million, nine hundred thirty-one thousand, sixty-nine".