13906969 has 6 divisors (see below), whose sum is σ = 14773454. Its totient is φ = 13088640.

The previous prime is 13906943. The next prime is 13906999. The reversal of 13906969 is 96960931.

It can be written as a sum of positive squares in 3 ways, for example, as 7209225 + 6697744 = 2685^2 + 2588^2 .

It is not a de Polignac number, because 13906969 - 2¹⁷ = 13775897 is a prime.

It is a super-2 number, since 2×13906969² = 386807573533922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13906909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23772 + ... + 24349.

Almost surely, 2^13906969 is an apocalyptic number.

It is an amenable number.

13906969 is a deficient number, since it is larger than the sum of its proper divisors (866485).

13906969 is an equidigital number, since it uses as much as digits as its factorization.

13906969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48155 (or 48138 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 13906969 is about 3729.2048750370. The cubic root of 13906969 is about 240.4791872873.

The spelling of 13906969 in words is "thirteen million, nine hundred six thousand, nine hundred sixty-nine".