13749749 has 8 divisors (see below), whose sum is σ = 15587040. Its totient is φ = 12023856.

The previous prime is 13749733. The next prime is 13749761. The reversal of 13749749 is 94794731.

It is a happy number.

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

It is not a de Polignac number, because 13749749 - 2⁴ = 13749733 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 (13749149) 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, 27587 + ... + 28080.

It is an arithmetic number, because the mean of its divisors is an integer number (1948380).

Almost surely, 2^13749749 is an apocalyptic number.

13749749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13749749 is a deficient number, since it is larger than the sum of its proper divisors (1837291).

13749749 is a wasteful number, since it uses less digits than its factorization.

13749749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55699.

The product of its digits is 190512, while the sum is 44.

The square root of 13749749 is about 3708.0653985603. The cubic root of 13749749 is about 239.5695350911.

The spelling of 13749749 in words is "thirteen million, seven hundred forty-nine thousand, seven hundred forty-nine".