13906819 has 2 divisors, whose sum is σ = 13906820. Its totient is φ = 13906818.

The previous prime is 13906813. The next prime is 13906843. The reversal of 13906819 is 91860931.

It is a weak prime.

It is an emirp because it is prime and its reverse (91860931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13906819 - 2⁵ = 13906787 is a prime.

It is a super-2 number, since 2×13906819² = 386799229397522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13906813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6953409 + 6953410.

It is an arithmetic number, because the mean of its divisors is an integer number (6953410).

Almost surely, 2^13906819 is an apocalyptic number.

13906819 is a deficient number, since it is larger than the sum of its proper divisors (1).

13906819 is an equidigital number, since it uses as much as digits as its factorization.

13906819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 13906819 is about 3729.1847634570. The cubic root of 13906819 is about 240.4783226846.

The spelling of 13906819 in words is "thirteen million, nine hundred six thousand, eight hundred nineteen".