13845991 has 2 divisors, whose sum is σ = 13845992. Its totient is φ = 13845990.

The previous prime is 13845971. The next prime is 13846037. The reversal of 13845991 is 19954831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13845991 - 2⁷ = 13845863 is a prime.

It is a super-2 number, since 2×13845991² = 383422933544162, which contains 22 as substring.

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, 6922995 + 6922996.

It is an arithmetic number, because the mean of its divisors is an integer number (6922996).

Almost surely, 2^13845991 is an apocalyptic number.

13845991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13845991 is an equidigital number, since it uses as much as digits as its factorization.

13845991 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 13845991 is about 3721.0201558175. The cubic root of 13845991 is about 240.1271953085.

The spelling of 13845991 in words is "thirteen million, eight hundred forty-five thousand, nine hundred ninety-one".