1383315891 has 32 divisors (see below), whose sum is σ = 2041003008. Its totient is φ = 829678080.

The previous prime is 1383315889. The next prime is 1383315911. The reversal of 1383315891 is 1985133831.

It is not a de Polignac number, because 1383315891 - 2¹ = 1383315889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1383315191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96361 + ... + 109781.

It is an arithmetic number, because the mean of its divisors is an integer number (63781344).

Almost surely, 2^1383315891 is an apocalyptic number.

1383315891 is a deficient number, since it is larger than the sum of its proper divisors (657687117).

1383315891 is a wasteful number, since it uses less digits than its factorization.

1383315891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13531.

The product of its digits is 77760, while the sum is 42.

The square root of 1383315891 is about 37192.9548570694. The cubic root of 1383315891 is about 1114.2272836624.

The spelling of 1383315891 in words is "one billion, three hundred eighty-three million, three hundred fifteen thousand, eight hundred ninety-one".