99860859 has 12 divisors (see below), whose sum is σ = 164849776. Its totient is φ = 57063312.

The previous prime is 99860801. The next prime is 99860879. The reversal of 99860859 is 95806899.

It is not a de Polignac number, because 99860859 - 2⁹ = 99860347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99860879) 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 in 11 ways as a sum of consecutive naturals, for example, 792484 + ... + 792609.

Almost surely, 2^99860859 is an apocalyptic number.

99860859 is a deficient number, since it is larger than the sum of its proper divisors (64988917).

99860859 is a wasteful number, since it uses less digits than its factorization.

99860859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585106 (or 1585103 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 99860859 is about 9993.0405282877. The cubic root of 99860859 is about 463.9435049999.

The spelling of 99860859 in words is "ninety-nine million, eight hundred sixty thousand, eight hundred fifty-nine".