13749791 has 8 divisors (see below), whose sum is σ = 15652224. Its totient is φ = 11956120.

The previous prime is 13749781. The next prime is 13749793. The reversal of 13749791 is 19794731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13749791 - 2²² = 9555487 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 (13749793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26921 + ... + 27426.

It is an arithmetic number, because the mean of its divisors is an integer number (1956528).

Almost surely, 2^13749791 is an apocalyptic number.

13749791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13749791 is a deficient number, since it is larger than the sum of its proper divisors (1902433).

13749791 is a wasteful number, since it uses less digits than its factorization.

13749791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54381.

The product of its digits is 47628, while the sum is 41.

The square root of 13749791 is about 3708.0710618865. The cubic root of 13749791 is about 239.5697790206.

The spelling of 13749791 in words is "thirteen million, seven hundred forty-nine thousand, seven hundred ninety-one".