988987043831 has 4 divisors (see below), whose sum is σ = 1015716423432. Its totient is φ = 962257664232.

The previous prime is 988987043827. The next prime is 988987043833. The reversal of 988987043831 is 138340789889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138340789889 = 773 ⋅178966093.

It is a cyclic number.

It is not a de Polignac number, because 988987043831 - 2² = 988987043827 is a prime.

It is a super-2 number, since 2×988987043831² (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 (988987043833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13364689745 + ... + 13364689818.

It is an arithmetic number, because the mean of its divisors is an integer number (253929105858).

Almost surely, 2^988987043831 is an apocalyptic number.

988987043831 is a deficient number, since it is larger than the sum of its proper divisors (26729379601).

988987043831 is a wasteful number, since it uses less digits than its factorization.

988987043831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26729379600.

The product of its (nonzero) digits is 83607552, while the sum is 68.

The spelling of 988987043831 in words is "nine hundred eighty-eight billion, nine hundred eighty-seven million, forty-three thousand, eight hundred thirty-one".