13869591 has 4 divisors (see below), whose sum is σ = 18492792. Its totient is φ = 9246392.

The previous prime is 13869589. The next prime is 13869593. The reversal of 13869591 is 19596831.

13869591 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13869589) and next prime (13869593).

It is a cyclic number.

It is not a de Polignac number, because 13869591 - 2¹ = 13869589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13869593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2311596 + ... + 2311601.

It is an arithmetic number, because the mean of its divisors is an integer number (4623198).

Almost surely, 2^13869591 is an apocalyptic number.

13869591 is a deficient number, since it is larger than the sum of its proper divisors (4623201).

13869591 is an equidigital number, since it uses as much as digits as its factorization.

13869591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623200.

The product of its digits is 58320, while the sum is 42.

The square root of 13869591 is about 3724.1899790424. The cubic root of 13869591 is about 240.2635472947.

The spelling of 13869591 in words is "thirteen million, eight hundred sixty-nine thousand, five hundred ninety-one".