1388879579 has 2 divisors, whose sum is σ = 1388879580. Its totient is φ = 1388879578.

The previous prime is 1388879567. The next prime is 1388879599. The reversal of 1388879579 is 9759788831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1388879579 - 2¹² = 1388875483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1388879509) 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 as a sum of consecutive naturals, namely, 694439789 + 694439790.

It is an arithmetic number, because the mean of its divisors is an integer number (694439790).

Almost surely, 2^1388879579 is an apocalyptic number.

1388879579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388879579 is an equidigital number, since it uses as much as digits as its factorization.

1388879579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 65.

The square root of 1388879579 is about 37267.6747195207. The cubic root of 1388879579 is about 1115.7190905262.

The spelling of 1388879579 in words is "one billion, three hundred eighty-eight million, eight hundred seventy-nine thousand, five hundred seventy-nine".