13869491 has 2 divisors, whose sum is σ = 13869492. Its totient is φ = 13869490.

The previous prime is 13869481. The next prime is 13869503. The reversal of 13869491 is 19496831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13869491 - 2²² = 9675187 is a prime.

It is not a weakly prime, because it can be changed into another prime (13869451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6934745 + 6934746.

It is an arithmetic number, because the mean of its divisors is an integer number (6934746).

Almost surely, 2^13869491 is an apocalyptic number.

13869491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13869491 is an equidigital number, since it uses as much as digits as its factorization.

13869491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 13869491 is about 3724.1765532799. The cubic root of 13869491 is about 240.2629698585.

The spelling of 13869491 in words is "thirteen million, eight hundred sixty-nine thousand, four hundred ninety-one".