13782749 has 2 divisors, whose sum is σ = 13782750. Its totient is φ = 13782748.

The previous prime is 13782721. The next prime is 13782757. The reversal of 13782749 is 94728731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 225625 = 3682^2 + 475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13782749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13782779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6891374 + 6891375.

It is an arithmetic number, because the mean of its divisors is an integer number (6891375).

Almost surely, 2^13782749 is an apocalyptic number.

It is an amenable number.

13782749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13782749 is an equidigital number, since it uses as much as digits as its factorization.

13782749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 13782749 is about 3712.5124915615. The cubic root of 13782749 is about 239.7610410918.

The spelling of 13782749 in words is "thirteen million, seven hundred eighty-two thousand, seven hundred forty-nine".