987742184431 has 8 divisors (see below), whose sum is σ = 1013473407744. Its totient is φ = 962089054080.

The previous prime is 987742184389. The next prime is 987742184449. The reversal of 987742184431 is 134481247789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987742184431 is a prime.

It is a super-2 number, since 2×987742184431² (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 (987742184461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19497615 + ... + 19548208.

It is an arithmetic number, because the mean of its divisors is an integer number (126684175968).

Almost surely, 2^987742184431 is an apocalyptic number.

987742184431 is a deficient number, since it is larger than the sum of its proper divisors (25731223313).

987742184431 is a wasteful number, since it uses less digits than its factorization.

987742184431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39046481.

The product of its digits is 10838016, while the sum is 58.

The spelling of 987742184431 in words is "nine hundred eighty-seven billion, seven hundred forty-two million, one hundred eighty-four thousand, four hundred thirty-one".