1376138765 has 8 divisors (see below), whose sum is σ = 1660013568. Its totient is φ = 1095146320.

The previous prime is 1376138741. The next prime is 1376138779. The reversal of 1376138765 is 5678316731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1376138765 - 2⁸ = 1376138509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719537 + ... + 721446.

It is an arithmetic number, because the mean of its divisors is an integer number (207501696).

Almost surely, 2^1376138765 is an apocalyptic number.

It is an amenable number.

1376138765 is a deficient number, since it is larger than the sum of its proper divisors (283874803).

1376138765 is a wasteful number, since it uses less digits than its factorization.

1376138765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441179.

The product of its digits is 635040, while the sum is 47.

The square root of 1376138765 is about 37096.3443616753. The cubic root of 1376138765 is about 1112.2969412667.

The spelling of 1376138765 in words is "one billion, three hundred seventy-six million, one hundred thirty-eight thousand, seven hundred sixty-five".