9987673831 has 4 divisors (see below), whose sum is σ = 10024803000. Its totient is φ = 9950544664.

The previous prime is 9987673823. The next prime is 9987673867. The reversal of 9987673831 is 1383767899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1383767899 = 349 ⋅3964951.

It is a cyclic number.

It is not a de Polignac number, because 9987673831 - 2³ = 9987673823 is a prime.

It is a super-2 number, since 2×9987673831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9987673831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987673811) 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, 18564181 + ... + 18564718.

It is an arithmetic number, because the mean of its divisors is an integer number (2506200750).

Almost surely, 2^9987673831 is an apocalyptic number.

9987673831 is a deficient number, since it is larger than the sum of its proper divisors (37129169).

9987673831 is a wasteful number, since it uses less digits than its factorization.

9987673831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37129168.

The product of its digits is 13716864, while the sum is 61.

The square root of 9987673831 is about 99938.3501514809. The cubic root of 9987673831 is about 2153.5491285432.

The spelling of 9987673831 in words is "nine billion, nine hundred eighty-seven million, six hundred seventy-three thousand, eight hundred thirty-one".