99998851 has 2 divisors, whose sum is σ = 99998852. Its totient is φ = 99998850.

The previous prime is 99998819. The next prime is 99998869. The reversal of 99998851 is 15889999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99998851 - 2⁵ = 99998819 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99998891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999425 + 49999426.

It is an arithmetic number, because the mean of its divisors is an integer number (49999426).

Almost surely, 2^99998851 is an apocalyptic number.

99998851 is a deficient number, since it is larger than the sum of its proper divisors (1).

99998851 is an equidigital number, since it uses as much as digits as its factorization.

99998851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 58.

The square root of 99998851 is about 9999.9425498350. The cubic root of 99998851 is about 464.1571056259.

The spelling of 99998851 in words is "ninety-nine million, nine hundred ninety-eight thousand, eight hundred fifty-one".