1338749 has 2 divisors, whose sum is σ = 1338750. Its totient is φ = 1338748.

The previous prime is 1338737. The next prime is 1338751. The reversal of 1338749 is 9478331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338649 + 100 = 1157^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338749 - 2¹⁶ = 1273213 is a prime.

Together with 1338751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338049) 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 as a sum of consecutive naturals, namely, 669374 + 669375.

It is an arithmetic number, because the mean of its divisors is an integer number (669375).

2^1338749 is an apocalyptic number.

It is an amenable number.

1338749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338749 is an equidigital number, since it uses as much as digits as its factorization.

1338749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 1338749 is about 1157.0432144047. The cubic root of 1338749 is about 110.2130581373.

The spelling of 1338749 in words is "one million, three hundred thirty-eight thousand, seven hundred forty-nine".