87297786684 has 18 divisors (see below), whose sum is σ = 220669405320. Its totient is φ = 29099262216.

The previous prime is 87297786683. The next prime is 87297786721. The reversal of 87297786684 is 48668779278.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87297786683) 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 5 ways as a sum of consecutive naturals, for example, 1212469224 + ... + 1212469295.

Almost surely, 2^87297786684 is an apocalyptic number.

It is an amenable number.

87297786684 is an abundant number, since it is smaller than the sum of its proper divisors (133371618636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87297786684 is a wasteful number, since it uses less digits than its factorization.

87297786684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424938529 (or 2424938524 counting only the distinct ones).

The product of its digits is 455196672, while the sum is 72.

The spelling of 87297786684 in words is "eighty-seven billion, two hundred ninety-seven million, seven hundred eighty-six thousand, six hundred eighty-four".