13983691 has 2 divisors, whose sum is σ = 13983692. Its totient is φ = 13983690.

The previous prime is 13983689. The next prime is 13983703. The reversal of 13983691 is 19638931.

13983691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13983691 - 2¹ = 13983689 is a prime.

It is a super-2 number, since 2×13983691² = 391087227966962, which contains 22 as substring.

Together with 13983689, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13983391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6991845 + 6991846.

It is an arithmetic number, because the mean of its divisors is an integer number (6991846).

Almost surely, 2^13983691 is an apocalyptic number.

13983691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13983691 is an equidigital number, since it uses as much as digits as its factorization.

13983691 is an evil number, because the sum of its binary digits is even.

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

The square root of 13983691 is about 3739.4773699008. The cubic root of 13983691 is about 240.9206019333.

The spelling of 13983691 in words is "thirteen million, nine hundred eighty-three thousand, six hundred ninety-one".