1388500079 has 2 divisors, whose sum is σ = 1388500080. Its totient is φ = 1388500078.

The previous prime is 1388500067. The next prime is 1388500153. The reversal of 1388500079 is 9700058831.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9700058831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388500079 - 2⁴ = 1388500063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388500039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694250039 + 694250040.

It is an arithmetic number, because the mean of its divisors is an integer number (694250040).

Almost surely, 2^1388500079 is an apocalyptic number.

1388500079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388500079 is an equidigital number, since it uses as much as digits as its factorization.

1388500079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1388500079 is about 37262.5828278180. The cubic root of 1388500079 is about 1115.6174608932.

The spelling of 1388500079 in words is "one billion, three hundred eighty-eight million, five hundred thousand, seventy-nine".