13949591 has 4 divisors (see below), whose sum is σ = 14683800. Its totient is φ = 13215384.

The previous prime is 13949581. The next prime is 13949603. The reversal of 13949591 is 19594931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19594931 = 17 ⋅1152643.

It is a cyclic number.

It is not a de Polignac number, because 13949591 - 2⁶ = 13949527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13949521) 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, 367076 + ... + 367113.

It is an arithmetic number, because the mean of its divisors is an integer number (3670950).

Almost surely, 2^13949591 is an apocalyptic number.

13949591 is a deficient number, since it is larger than the sum of its proper divisors (734209).

13949591 is an equidigital number, since it uses as much as digits as its factorization.

13949591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734208.

The product of its digits is 43740, while the sum is 41.

The square root of 13949591 is about 3734.9151262110. The cubic root of 13949591 is about 240.7246098193.

The spelling of 13949591 in words is "thirteen million, nine hundred forty-nine thousand, five hundred ninety-one".