1389996999831 has 24 divisors (see below), whose sum is σ = 2037359508352. Its totient is φ = 842327758800.

The previous prime is 1389996999821. The next prime is 1389996999929.

1389996999831 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1389996999831 - 2⁵ = 1389996999799 is a prime.

It is a super-2 number, since 2×1389996999831² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389996999821) 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 23 ways as a sum of consecutive naturals, for example, 3089430 + ... + 3510636.

Almost surely, 2^{1389996999831} is an apocalyptic number.

1389996999831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1389996999831 is a deficient number, since it is larger than the sum of its proper divisors (647362508521).

1389996999831 is a wasteful number, since it uses less digits than its factorization.

1389996999831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430323 (or 430312 counting only the distinct ones).

The product of its digits is 1836660096, while the sum is 84.

The spelling of 1389996999831 in words is "one trillion, three hundred eighty-nine billion, nine hundred ninety-six million, nine hundred ninety-nine thousand, eight hundred thirty-one".