13749691 has 2 divisors, whose sum is σ = 13749692. Its totient is φ = 13749690.

The previous prime is 13749679. The next prime is 13749733. The reversal of 13749691 is 19694731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13749691 - 2¹⁹ = 13225403 is a prime.

It is equal to p₈₉₄₈₅₆ and since 13749691 and 894856 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13749601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6874845 + 6874846.

It is an arithmetic number, because the mean of its divisors is an integer number (6874846).

Almost surely, 2^13749691 is an apocalyptic number.

13749691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13749691 is an equidigital number, since it uses as much as digits as its factorization.

13749691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 13749691 is about 3708.0575777622. The cubic root of 13749691 is about 239.5691982352.

The spelling of 13749691 in words is "thirteen million, seven hundred forty-nine thousand, six hundred ninety-one".