13845919 has 2 divisors, whose sum is σ = 13845920. Its totient is φ = 13845918.

The previous prime is 13845917. The next prime is 13845941. The reversal of 13845919 is 91954831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13845919 - 2¹ = 13845917 is a prime.

It is a super-2 number, since 2×13845919² = 383418945909122, which contains 22 as substring.

Together with 13845917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13845911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6922959 + 6922960.

It is an arithmetic number, because the mean of its divisors is an integer number (6922960).

Almost surely, 2^13845919 is an apocalyptic number.

13845919 is a deficient number, since it is larger than the sum of its proper divisors (1).

13845919 is an equidigital number, since it uses as much as digits as its factorization.

13845919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 13845919 is about 3721.0104810387. The cubic root of 13845919 is about 240.1267790825.

The spelling of 13845919 in words is "thirteen million, eight hundred forty-five thousand, nine hundred nineteen".