13885919 has 2 divisors, whose sum is σ = 13885920. Its totient is φ = 13885918.

The previous prime is 13885901. The next prime is 13885931. The reversal of 13885919 is 91958831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13885919 - 2¹² = 13881823 is a prime.

It is a super-2 number, since 2×13885919² = 385637492949122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13885919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13885999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6942959 + 6942960.

It is an arithmetic number, because the mean of its divisors is an integer number (6942960).

Almost surely, 2^13885919 is an apocalyptic number.

13885919 is a deficient number, since it is larger than the sum of its proper divisors (1).

13885919 is an equidigital number, since it uses as much as digits as its factorization.

13885919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 44.

The square root of 13885919 is about 3726.3814887904. The cubic root of 13885919 is about 240.3577938793.

The spelling of 13885919 in words is "thirteen million, eight hundred eighty-five thousand, nine hundred nineteen".