1388282279 has 2 divisors, whose sum is σ = 1388282280. Its totient is φ = 1388282278.

The previous prime is 1388282249. The next prime is 1388282297. The reversal of 1388282279 is 9722828831.

Together with next prime (1388282297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1388282279 - 2¹⁶ = 1388216743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388282249) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694141139 + 694141140.

It is an arithmetic number, because the mean of its divisors is an integer number (694141140).

Almost surely, 2^1388282279 is an apocalyptic number.

1388282279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388282279 is an equidigital number, since it uses as much as digits as its factorization.

1388282279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 50.

The square root of 1388282279 is about 37259.6602104743. The cubic root of 1388282279 is about 1115.5591259574.

The spelling of 1388282279 in words is "one billion, three hundred eighty-eight million, two hundred eighty-two thousand, two hundred seventy-nine".