1379188009 has 16 divisors (see below), whose sum is σ = 1419042240. Its totient is φ = 1340089920.

The previous prime is 1379187989. The next prime is 1379188021. The reversal of 1379188009 is 9008819731.

It is a cyclic number.

It is not a de Polignac number, because 1379188009 - 2²³ = 1370799401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1379188009.

It is not an unprimeable number, because it can be changed into a prime (1379188079) 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, 1419894 + ... + 1420864.

It is an arithmetic number, because the mean of its divisors is an integer number (88690140).

Almost surely, 2^1379188009 is an apocalyptic number.

It is an amenable number.

1379188009 is a deficient number, since it is larger than the sum of its proper divisors (39854231).

1379188009 is a wasteful number, since it uses less digits than its factorization.

1379188009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1379188009 is about 37137.4206024059. The cubic root of 1379188009 is about 1113.1178765918.

The spelling of 1379188009 in words is "one billion, three hundred seventy-nine million, one hundred eighty-eight thousand, nine".