98819999 has 2 divisors, whose sum is σ = 98820000. Its totient is φ = 98819998.

The previous prime is 98819989. The next prime is 98820013. The reversal of 98819999 is 99991889.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98819999 - 2¹⁶ = 98754463 is a prime.

98819999 is a modest number, since divided by 9999 gives 9881 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98819989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49409999 + 49410000.

It is an arithmetic number, because the mean of its divisors is an integer number (49410000).

Almost surely, 2^98819999 is an apocalyptic number.

98819999 is a deficient number, since it is larger than the sum of its proper divisors (1).

98819999 is an equidigital number, since it uses as much as digits as its factorization.

98819999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 62.

The square root of 98819999 is about 9940.8248651709. The cubic root of 98819999 is about 462.3259616909.

The spelling of 98819999 in words is "ninety-eight million, eight hundred nineteen thousand, nine hundred ninety-nine".