99998807 has 4 divisors (see below), whose sum is σ = 100287336. Its totient is φ = 99710280.

The previous prime is 99998797. The next prime is 99998819. The reversal of 99998807 is 70889999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99998807 - 2⁸ = 99998551 is a prime.

It is a super-2 number, since 2×99998807² = 19999522802846498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99998207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143744 + ... + 144437.

It is an arithmetic number, because the mean of its divisors is an integer number (25071834).

Almost surely, 2^99998807 is an apocalyptic number.

99998807 is a deficient number, since it is larger than the sum of its proper divisors (288529).

99998807 is a wasteful number, since it uses less digits than its factorization.

99998807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288528.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 99998807 is about 9999.9403498221. The cubic root of 99998807 is about 464.1570375488.

The spelling of 99998807 in words is "ninety-nine million, nine hundred ninety-eight thousand, eight hundred seven".