97986118987 has 2 divisors, whose sum is σ = 97986118988. Its totient is φ = 97986118986.

The previous prime is 97986118963. The next prime is 97986118991. The reversal of 97986118987 is 78981168979.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97986118987 - 2⁷ = 97986118859 is a prime.

It is not a weakly prime, because it can be changed into another prime (97986118387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48993059493 + 48993059494.

It is an arithmetic number, because the mean of its divisors is an integer number (48993059494).

Almost surely, 2^97986118987 is an apocalyptic number.

97986118987 is a deficient number, since it is larger than the sum of its proper divisors (1).

97986118987 is an equidigital number, since it uses as much as digits as its factorization.

97986118987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 73.

The spelling of 97986118987 in words is "ninety-seven billion, nine hundred eighty-six million, one hundred eighteen thousand, nine hundred eighty-seven".