13698989 has 2 divisors, whose sum is σ = 13698990. Its totient is φ = 13698988.

The previous prime is 13698973. The next prime is 13699001. The reversal of 13698989 is 98989631.

13698989 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., 7155625 + 6543364 = 2675^2 + 2558^2 .

It is a cyclic number.

It is not a de Polignac number, because 13698989 - 2⁴ = 13698973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13698989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13698929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6849494 + 6849495.

It is an arithmetic number, because the mean of its divisors is an integer number (6849495).

Almost surely, 2^13698989 is an apocalyptic number.

It is an amenable number.

13698989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13698989 is an equidigital number, since it uses as much as digits as its factorization.

13698989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 13698989 is about 3701.2145303940. The cubic root of 13698989 is about 239.2743649817.

The spelling of 13698989 in words is "thirteen million, six hundred ninety-eight thousand, nine hundred eighty-nine".