13969813 has 24 divisors (see below), whose sum is σ = 16892064. Its totient is φ = 11473440.

The previous prime is 13969811. The next prime is 13969817. The reversal of 13969813 is 31896931.

13969813 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 13969813 - 2¹ = 13969811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13969811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130506 + ... + 130612.

It is an arithmetic number, because the mean of its divisors is an integer number (703836).

Almost surely, 2^13969813 is an apocalyptic number.

13969813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13969813 is a deficient number, since it is larger than the sum of its proper divisors (2922251).

13969813 is a wasteful number, since it uses less digits than its factorization.

13969813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 214 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 13969813 is about 3737.6213023794. The cubic root of 13969813 is about 240.8408756579.

The spelling of 13969813 in words is "thirteen million, nine hundred sixty-nine thousand, eight hundred thirteen".