13749005 has 8 divisors (see below), whose sum is σ = 17469432. Its totient is φ = 10352128.

The previous prime is 13748993. The next prime is 13749007. The reversal of 13749005 is 50094731.

13749005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 925444 + 12823561 = 962^2 + 3581^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13749005 - 2¹⁸ = 13486861 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 (13749007) 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, 80792 + ... + 80961.

It is an arithmetic number, because the mean of its divisors is an integer number (2183679).

Almost surely, 2^13749005 is an apocalyptic number.

It is an amenable number.

13749005 is a deficient number, since it is larger than the sum of its proper divisors (3720427).

13749005 is a wasteful number, since it uses less digits than its factorization.

13749005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161775.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 13749005 is about 3707.9650753479. The cubic root of 13749005 is about 239.5652139710.

The spelling of 13749005 in words is "thirteen million, seven hundred forty-nine thousand, five".