1381659775 has 12 divisors (see below), whose sum is σ = 1713787632. Its totient is φ = 1104986240.

The previous prime is 1381659737. The next prime is 1381659781. The reversal of 1381659775 is 5779561831.

It is not a de Polignac number, because 1381659775 - 2¹⁵ = 1381627007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102054 + ... + 114796.

It is an arithmetic number, because the mean of its divisors is an integer number (142815636).

Almost surely, 2^1381659775 is an apocalyptic number.

1381659775 is a deficient number, since it is larger than the sum of its proper divisors (332127857).

1381659775 is a wasteful number, since it uses less digits than its factorization.

1381659775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17090 (or 17085 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 52.

The square root of 1381659775 is about 37170.6843493633. The cubic root of 1381659775 is about 1113.7824523860.

The spelling of 1381659775 in words is "one billion, three hundred eighty-one million, six hundred fifty-nine thousand, seven hundred seventy-five".