1388233079 has 2 divisors, whose sum is σ = 1388233080. Its totient is φ = 1388233078.

The previous prime is 1388233051. The next prime is 1388233097. The reversal of 1388233079 is 9703328831.

Together with next prime (1388233097) 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 a de Polignac number, because none of the positive numbers 2^k-1388233079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388233009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694116539 + 694116540.

It is an arithmetic number, because the mean of its divisors is an integer number (694116540).

Almost surely, 2^1388233079 is an apocalyptic number.

1388233079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388233079 is an equidigital number, since it uses as much as digits as its factorization.

1388233079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1388233079 is about 37258.9999731608. Note that the first 4 decimals coincide. The cubic root of 1388233079 is about 1115.5459475238.

The spelling of 1388233079 in words is "one billion, three hundred eighty-eight million, two hundred thirty-three thousand, seventy-nine".