13427749 has 2 divisors, whose sum is σ = 13427750. Its totient is φ = 13427748.

The previous prime is 13427723. The next prime is 13427753. The reversal of 13427749 is 94772431.

13427749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7739524 + 5688225 = 2782^2 + 2385^2 .

It is a cyclic number.

It is not a de Polignac number, because 13427749 - 2¹¹ = 13425701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13427719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6713874 + 6713875.

It is an arithmetic number, because the mean of its divisors is an integer number (6713875).

Almost surely, 2^13427749 is an apocalyptic number.

It is an amenable number.

13427749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13427749 is an equidigital number, since it uses as much as digits as its factorization.

13427749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 13427749 is about 3664.3893079202. The cubic root of 13427749 is about 237.6846150900.

The spelling of 13427749 in words is "thirteen million, four hundred twenty-seven thousand, seven hundred forty-nine".