1383657749 has 2 divisors, whose sum is σ = 1383657750. Its totient is φ = 1383657748.

The previous prime is 1383657731. The next prime is 1383657797. The reversal of 1383657749 is 9477563831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1231308100 + 152349649 = 35090^2 + 12343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1383657749 - 2⁸ = 1383657493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1383657749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1383657949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691828874 + 691828875.

It is an arithmetic number, because the mean of its divisors is an integer number (691828875).

Almost surely, 2^1383657749 is an apocalyptic number.

It is an amenable number.

1383657749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1383657749 is an equidigital number, since it uses as much as digits as its factorization.

1383657749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 53.

The square root of 1383657749 is about 37197.5503091265. The cubic root of 1383657749 is about 1114.3190622021.

The spelling of 1383657749 in words is "one billion, three hundred eighty-three million, six hundred fifty-seven thousand, seven hundred forty-nine".