1378915827 has 12 divisors (see below), whose sum is σ = 1849741896. Its totient is φ = 913717120.

The previous prime is 1378915799. The next prime is 1378915831. The reversal of 1378915827 is 7285198731.

It is not a de Polignac number, because 1378915827 - 2¹⁵ = 1378883059 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1378915827.

It is not an unprimeable number, because it can be changed into a prime (1378915847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75427 + ... + 91907.

It is an arithmetic number, because the mean of its divisors is an integer number (154145158).

Almost surely, 2^1378915827 is an apocalyptic number.

1378915827 is a deficient number, since it is larger than the sum of its proper divisors (470826069).

1378915827 is an equidigital number, since it uses as much as digits as its factorization.

1378915827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16818 (or 16651 counting only the distinct ones).

The product of its digits is 846720, while the sum is 51.

The square root of 1378915827 is about 37133.7558967579. The cubic root of 1378915827 is about 1113.0446473728.

The spelling of 1378915827 in words is "one billion, three hundred seventy-eight million, nine hundred fifteen thousand, eight hundred twenty-seven".