13864819 has 2 divisors, whose sum is σ = 13864820. Its totient is φ = 13864818.

The previous prime is 13864801. The next prime is 13864831. The reversal of 13864819 is 91846831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13864819 - 2⁵ = 13864787 is a prime.

It is a super-2 number, since 2×13864819² = 384466411805522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13864849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6932409 + 6932410.

It is an arithmetic number, because the mean of its divisors is an integer number (6932410).

Almost surely, 2^13864819 is an apocalyptic number.

13864819 is a deficient number, since it is larger than the sum of its proper divisors (1).

13864819 is an equidigital number, since it uses as much as digits as its factorization.

13864819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 13864819 is about 3723.5492476937. The cubic root of 13864819 is about 240.2359889438.

The spelling of 13864819 in words is "thirteen million, eight hundred sixty-four thousand, eight hundred nineteen".