1388159597 has 4 divisors (see below), whose sum is σ = 1514355936. Its totient is φ = 1261963260.

The previous prime is 1388159593. The next prime is 1388159603. The reversal of 1388159597 is 7959518831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7959518831 = 11 ⋅723592621.

It is a cyclic number.

It is not a de Polignac number, because 1388159597 - 2² = 1388159593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388159593) 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 in 3 ways as a sum of consecutive naturals, for example, 63098153 + ... + 63098174.

It is an arithmetic number, because the mean of its divisors is an integer number (378588984).

Almost surely, 2^1388159597 is an apocalyptic number.

It is an amenable number.

1388159597 is a deficient number, since it is larger than the sum of its proper divisors (126196339).

1388159597 is a wasteful number, since it uses less digits than its factorization.

1388159597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126196338.

The product of its digits is 2721600, while the sum is 56.

The square root of 1388159597 is about 37258.0138627920. The cubic root of 1388159597 is about 1115.5262644713.

The spelling of 1388159597 in words is "one billion, three hundred eighty-eight million, one hundred fifty-nine thousand, five hundred ninety-seven".