1388742871 has 2 divisors, whose sum is σ = 1388742872. Its totient is φ = 1388742870.

The previous prime is 1388742863. The next prime is 1388742877. The reversal of 1388742871 is 1782478831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1388742871 - 2³ = 1388742863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388742877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694371435 + 694371436.

It is an arithmetic number, because the mean of its divisors is an integer number (694371436).

Almost surely, 2^1388742871 is an apocalyptic number.

1388742871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388742871 is an equidigital number, since it uses as much as digits as its factorization.

1388742871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 602112, while the sum is 49.

The square root of 1388742871 is about 37265.8405379511. The cubic root of 1388742871 is about 1115.6824824255.

The spelling of 1388742871 in words is "one billion, three hundred eighty-eight million, seven hundred forty-two thousand, eight hundred seventy-one".