99039861 has 16 divisors (see below), whose sum is σ = 150692800. Its totient is φ = 64241424.

The previous prime is 99039859. The next prime is 99039883. The reversal of 99039861 is 16893099.

It is not a de Polignac number, because 99039861 - 2¹ = 99039859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99039821) 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 15 ways as a sum of consecutive naturals, for example, 48571 + ... + 50568.

It is an arithmetic number, because the mean of its divisors is an integer number (9418300).

Almost surely, 2^99039861 is an apocalyptic number.

It is an amenable number.

99039861 is a deficient number, since it is larger than the sum of its proper divisors (51652939).

99039861 is a wasteful number, since it uses less digits than its factorization.

99039861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99185 (or 99179 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 99039861 is about 9951.8772600952. The cubic root of 99039861 is about 462.6685799870.

The spelling of 99039861 in words is "ninety-nine million, thirty-nine thousand, eight hundred sixty-one".