1376744399 has 2 divisors, whose sum is σ = 1376744400. Its totient is φ = 1376744398.

The previous prime is 1376744387. The next prime is 1376744401. The reversal of 1376744399 is 9934476731.

It is a strong prime.

It is an emirp because it is prime and its reverse (9934476731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1376744399 is a prime.

It is a Sophie Germain prime.

Together with 1376744401, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1376744399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376744309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688372199 + 688372200.

It is an arithmetic number, because the mean of its divisors is an integer number (688372200).

Almost surely, 2^1376744399 is an apocalyptic number.

1376744399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376744399 is an equidigital number, since it uses as much as digits as its factorization.

1376744399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 53.

The square root of 1376744399 is about 37104.5064513733. The cubic root of 1376744399 is about 1112.4600900382.

The spelling of 1376744399 in words is "one billion, three hundred seventy-six million, seven hundred forty-four thousand, three hundred ninety-nine".