99898819 has 2 divisors, whose sum is σ = 99898820. Its totient is φ = 99898818.

The previous prime is 99898793. The next prime is 99898849. The reversal of 99898819 is 91889899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99898819 - 2⁷ = 99898691 is a prime.

It is a super-2 number, since 2×99898819² = 19959548075189522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99898849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49949409 + 49949410.

It is an arithmetic number, because the mean of its divisors is an integer number (49949410).

Almost surely, 2^99898819 is an apocalyptic number.

99898819 is a deficient number, since it is larger than the sum of its proper divisors (1).

99898819 is an equidigital number, since it uses as much as digits as its factorization.

99898819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 61.

The square root of 99898819 is about 9994.9396696528. The cubic root of 99898819 is about 464.0022836664.

The spelling of 99898819 in words is "ninety-nine million, eight hundred ninety-eight thousand, eight hundred nineteen".