13694909 has 2 divisors, whose sum is σ = 13694910. Its totient is φ = 13694908.

The previous prime is 13694899. The next prime is 13694951. The reversal of 13694909 is 90949631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 770884 = 3595^2 + 878^2 .

It is an emirp because it is prime and its reverse (90949631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13694909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13694969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6847454 + 6847455.

It is an arithmetic number, because the mean of its divisors is an integer number (6847455).

Almost surely, 2^13694909 is an apocalyptic number.

It is an amenable number.

13694909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13694909 is an equidigital number, since it uses as much as digits as its factorization.

13694909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 13694909 is about 3700.6633189200. The cubic root of 13694909 is about 239.2506080863.

The spelling of 13694909 in words is "thirteen million, six hundred ninety-four thousand, nine hundred nine".