97987859 has 2 divisors, whose sum is σ = 97987860. Its totient is φ = 97987858.

The previous prime is 97987853. The next prime is 97987907. The reversal of 97987859 is 95878979.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97987859 is a prime.

It is a super-2 number, since 2×97987859² = 19203241022807762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97987853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48993929 + 48993930.

It is an arithmetic number, because the mean of its divisors is an integer number (48993930).

Almost surely, 2^97987859 is an apocalyptic number.

97987859 is a deficient number, since it is larger than the sum of its proper divisors (1).

97987859 is an equidigital number, since it uses as much as digits as its factorization.

97987859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 62.

The square root of 97987859 is about 9898.8817045159. The cubic root of 97987859 is about 461.0245891995.

The spelling of 97987859 in words is "ninety-seven million, nine hundred eighty-seven thousand, eight hundred fifty-nine".