98686891 has 2 divisors, whose sum is σ = 98686892. Its totient is φ = 98686890.

The previous prime is 98686871. The next prime is 98686909. The reversal of 98686891 is 19868689.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 98686891 - 2¹⁵ = 98654123 is a prime.

It is not a weakly prime, because it can be changed into another prime (98686871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49343445 + 49343446.

It is an arithmetic number, because the mean of its divisors is an integer number (49343446).

Almost surely, 2^98686891 is an apocalyptic number.

98686891 is a deficient number, since it is larger than the sum of its proper divisors (1).

98686891 is an equidigital number, since it uses as much as digits as its factorization.

98686891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 55.

The square root of 98686891 is about 9934.1275912885. The cubic root of 98686891 is about 462.1182880215.

The spelling of 98686891 in words is "ninety-eight million, six hundred eighty-six thousand, eight hundred ninety-one".