1381675817 has 4 divisors (see below), whose sum is σ = 1381752276. Its totient is φ = 1381599360.

The previous prime is 1381675811. The next prime is 1381675829. The reversal of 1381675817 is 7185761831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 566630416 + 815045401 = 23804^2 + 28549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381675817 - 2¹⁰ = 1381674793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381675811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5717 + ... + 52877.

It is an arithmetic number, because the mean of its divisors is an integer number (345438069).

Almost surely, 2^1381675817 is an apocalyptic number.

It is an amenable number.

1381675817 is a deficient number, since it is larger than the sum of its proper divisors (76459).

1381675817 is an equidigital number, since it uses as much as digits as its factorization.

1381675817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76458.

The product of its digits is 282240, while the sum is 47.

The square root of 1381675817 is about 37170.9001370696. The cubic root of 1381675817 is about 1113.7867629573.

The spelling of 1381675817 in words is "one billion, three hundred eighty-one million, six hundred seventy-five thousand, eight hundred seventeen".