1388395827497 has 4 divisors (see below), whose sum is σ = 1586738088576. Its totient is φ = 1190053566420.

The previous prime is 1388395827463. The next prime is 1388395827503. The reversal of 1388395827497 is 7947285938831.

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.

It is a cyclic number.

It is not a de Polignac number, because 1388395827497 - 2³⁸ = 1113517920553 is a prime.

It is a super-2 number, since 2×1388395827497² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388395827437) 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, 99171130529 + ... + 99171130542.

It is an arithmetic number, because the mean of its divisors is an integer number (396684522144).

Almost surely, 2^{1388395827497} is an apocalyptic number.

It is an amenable number.

1388395827497 is a deficient number, since it is larger than the sum of its proper divisors (198342261079).

1388395827497 is an equidigital number, since it uses as much as digits as its factorization.

1388395827497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198342261078.

The product of its digits is 731566080, while the sum is 74.

The spelling of 1388395827497 in words is "one trillion, three hundred eighty-eight billion, three hundred ninety-five million, eight hundred twenty-seven thousand, four hundred ninety-seven".