13799749 has 2 divisors, whose sum is σ = 13799750. Its totient is φ = 13799748.

The previous prime is 13799741. The next prime is 13799759. The reversal of 13799749 is 94799731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11682724 + 2117025 = 3418^2 + 1455^2 .

It is a cyclic number.

It is not a de Polignac number, because 13799749 - 2³ = 13799741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13799741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6899874 + 6899875.

It is an arithmetic number, because the mean of its divisors is an integer number (6899875).

Almost surely, 2^13799749 is an apocalyptic number.

It is an amenable number.

13799749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13799749 is an equidigital number, since it uses as much as digits as its factorization.

13799749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 13799749 is about 3714.8013405834. The cubic root of 13799749 is about 239.8595764192.

The spelling of 13799749 in words is "thirteen million, seven hundred ninety-nine thousand, seven hundred forty-nine".