13969709 has 12 divisors (see below), whose sum is σ = 15266592. Its totient is φ = 12776400.

The previous prime is 13969691. The next prime is 13969721. The reversal of 13969709 is 90796931.

It is a happy number.

13969709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13969709 - 2¹⁶ = 13904173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13969709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13969759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21824 + ... + 22454.

It is an arithmetic number, because the mean of its divisors is an integer number (1272216).

Almost surely, 2^13969709 is an apocalyptic number.

It is an amenable number.

13969709 is a deficient number, since it is larger than the sum of its proper divisors (1296883).

13969709 is a wasteful number, since it uses less digits than its factorization.

13969709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 13969709 is about 3737.6073897615. The cubic root of 13969709 is about 240.8402779999.

The spelling of 13969709 in words is "thirteen million, nine hundred sixty-nine thousand, seven hundred nine".