1375381887 has 16 divisors (see below), whose sum is σ = 2001175680. Its totient is φ = 833306400.

The previous prime is 1375381879. The next prime is 1375381949. The reversal of 1375381887 is 7881835731.

It is not a de Polignac number, because 1375381887 - 2³ = 1375381879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375381817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202212 + ... + 208902.

It is an arithmetic number, because the mean of its divisors is an integer number (125073480).

Almost surely, 2^1375381887 is an apocalyptic number.

1375381887 is a deficient number, since it is larger than the sum of its proper divisors (625793793).

1375381887 is a wasteful number, since it uses less digits than its factorization.

1375381887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12934.

The product of its digits is 1128960, while the sum is 51.

The square root of 1375381887 is about 37086.1414412446. The cubic root of 1375381887 is about 1112.0929823112.

The spelling of 1375381887 in words is "one billion, three hundred seventy-five million, three hundred eighty-one thousand, eight hundred eighty-seven".