1375377399 has 12 divisors (see below), whose sum is σ = 2167261512. Its totient is φ = 833562000.

The previous prime is 1375377383. The next prime is 1375377413. The reversal of 1375377399 is 9937735731.

It is a happy number.

1375377399 is a `hidden beast` number, since 1 + 37 + 537 + 73 + 9 + 9 = 666.

It is not a de Polignac number, because 1375377399 - 2⁴ = 1375377383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375377329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6946252 + ... + 6946449.

It is an arithmetic number, because the mean of its divisors is an integer number (180605126).

Almost surely, 2^1375377399 is an apocalyptic number.

1375377399 is a deficient number, since it is larger than the sum of its proper divisors (791884113).

1375377399 is a wasteful number, since it uses less digits than its factorization.

1375377399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13892718 (or 13892715 counting only the distinct ones).

The product of its digits is 3750705, while the sum is 54.

The square root of 1375377399 is about 37086.0809334176. The cubic root of 1375377399 is about 1112.0917726887.

The spelling of 1375377399 in words is "one billion, three hundred seventy-five million, three hundred seventy-seven thousand, three hundred ninety-nine".