1381326279 has 16 divisors (see below), whose sum is σ = 1956360672. Its totient is φ = 863935488.

The previous prime is 1381326259. The next prime is 1381326301. The reversal of 1381326279 is 9726231831.

It is not a de Polignac number, because 1381326279 - 2²¹ = 1379229127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1381326279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381326209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27304 + ... + 59229.

It is an arithmetic number, because the mean of its divisors is an integer number (122272542).

Almost surely, 2^1381326279 is an apocalyptic number.

1381326279 is a deficient number, since it is larger than the sum of its proper divisors (575034393).

1381326279 is a wasteful number, since it uses less digits than its factorization.

1381326279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86866.

The product of its digits is 108864, while the sum is 42.

The square root of 1381326279 is about 37166.1980702896. The cubic root of 1381326279 is about 1113.6928326670.

The spelling of 1381326279 in words is "one billion, three hundred eighty-one million, three hundred twenty-six thousand, two hundred seventy-nine".