13993517 has 2 divisors, whose sum is σ = 13993518. Its totient is φ = 13993516.

The previous prime is 13993513. The next prime is 13993523. The reversal of 13993517 is 71539931.

13993517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 259081 = 3706^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 13993517 - 2² = 13993513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13993513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6996758 + 6996759.

It is an arithmetic number, because the mean of its divisors is an integer number (6996759).

Almost surely, 2^13993517 is an apocalyptic number.

It is an amenable number.

13993517 is a deficient number, since it is larger than the sum of its proper divisors (1).

13993517 is an equidigital number, since it uses as much as digits as its factorization.

13993517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25515, while the sum is 38.

The square root of 13993517 is about 3740.7909591422. The cubic root of 13993517 is about 240.9770184062.

The spelling of 13993517 in words is "thirteen million, nine hundred ninety-three thousand, five hundred seventeen".