97731861587 has 8 divisors (see below), whose sum is σ = 98358664320. Its totient is φ = 97106742720.

The previous prime is 97731861583. The next prime is 97731861593. The reversal of 97731861587 is 78516813779.

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

It is a cyclic number.

It is not a de Polignac number, because 97731861587 - 2² = 97731861583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97731861583) 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, 304412 + ... + 536777.

It is an arithmetic number, because the mean of its divisors is an integer number (12294833040).

Almost surely, 2^97731861587 is an apocalyptic number.

97731861587 is a deficient number, since it is larger than the sum of its proper divisors (626802733).

97731861587 is a wasteful number, since it uses less digits than its factorization.

97731861587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841933.

The product of its digits is 17781120, while the sum is 62.

The spelling of 97731861587 in words is "ninety-seven billion, seven hundred thirty-one million, eight hundred sixty-one thousand, five hundred eighty-seven".