97187786971 has 24 divisors (see below), whose sum is σ = 111089260800. Its totient is φ = 84858681600.

The previous prime is 97187786963. The next prime is 97187786987. The reversal of 97187786971 is 17968778179.

It is not a de Polignac number, because 97187786971 - 2³ = 97187786963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97187786971.

It is not an unprimeable number, because it can be changed into a prime (97187766971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 597715 + ... + 742723.

It is an arithmetic number, because the mean of its divisors is an integer number (4628719200).

Almost surely, 2^97187786971 is an apocalyptic number.

97187786971 is a deficient number, since it is larger than the sum of its proper divisors (13901473829).

97187786971 is a wasteful number, since it uses less digits than its factorization.

97187786971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145251 (or 145240 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 70.

The spelling of 97187786971 in words is "ninety-seven billion, one hundred eighty-seven million, seven hundred eighty-six thousand, nine hundred seventy-one".