1387823112643 has 4 divisors (see below), whose sum is σ = 1513988850168. Its totient is φ = 1261657375120.

The previous prime is 1387823112631. The next prime is 1387823112719. The reversal of 1387823112643 is 3462113287831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387823112643 is a prime.

It is a super-2 number, since 2×1387823112643² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387823112743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63082868746 + ... + 63082868767.

It is an arithmetic number, because the mean of its divisors is an integer number (378497212542).

Almost surely, 2^{1387823112643} is an apocalyptic number.

1387823112643 is a deficient number, since it is larger than the sum of its proper divisors (126165737525).

1387823112643 is a wasteful number, since it uses less digits than its factorization.

1387823112643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126165737524.

The product of its digits is 1161216, while the sum is 49.

The spelling of 1387823112643 in words is "one trillion, three hundred eighty-seven billion, eight hundred twenty-three million, one hundred twelve thousand, six hundred forty-three".