87731703791 has 8 divisors (see below), whose sum is σ = 90572095104. Its totient is φ = 84891958560.

The previous prime is 87731703781. The next prime is 87731703799. The reversal of 87731703791 is 19730713778.

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-87731703791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87731703799) 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, 122405 + ... + 436401.

It is an arithmetic number, because the mean of its divisors is an integer number (11321511888).

Almost surely, 2^87731703791 is an apocalyptic number.

87731703791 is a deficient number, since it is larger than the sum of its proper divisors (2840391313).

87731703791 is a wasteful number, since it uses less digits than its factorization.

87731703791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323041.

The product of its (nonzero) digits is 1555848, while the sum is 53.

The spelling of 87731703791 in words is "eighty-seven billion, seven hundred thirty-one million, seven hundred three thousand, seven hundred ninety-one".