13749669 has 16 divisors (see below), whose sum is σ = 20624640. Its totient is φ = 9164988.

The previous prime is 13749667. The next prime is 13749679. The reversal of 13749669 is 96694731.

It is not a de Polignac number, because 13749669 - 2¹ = 13749667 is a prime.

It is a super-2 number, since 2×13749669² = 378106795219122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13749661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957 + ... + 5330.

It is an arithmetic number, because the mean of its divisors is an integer number (1289040).

Almost surely, 2^13749669 is an apocalyptic number.

It is an amenable number.

13749669 is a deficient number, since it is larger than the sum of its proper divisors (6874971).

13749669 is an frugal number, since it uses more digits than its factorization.

13749669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6308 (or 6290 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 13749669 is about 3708.0546112483. The cubic root of 13749669 is about 239.5690704620.

The spelling of 13749669 in words is "thirteen million, seven hundred forty-nine thousand, six hundred sixty-nine".