98990999 has 2 divisors, whose sum is σ = 98991000. Its totient is φ = 98990998.

The previous prime is 98990987. The next prime is 98991037. The reversal of 98990999 is 99909989.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98990999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98990299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49495499 + 49495500.

It is an arithmetic number, because the mean of its divisors is an integer number (49495500).

Almost surely, 2^98990999 is an apocalyptic number.

98990999 is a deficient number, since it is larger than the sum of its proper divisors (1).

98990999 is an equidigital number, since it uses as much as digits as its factorization.

98990999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4251528, while the sum is 62.

The square root of 98990999 is about 9949.4220435159. The cubic root of 98990999 is about 462.5924805569.

The spelling of 98990999 in words is "ninety-eight million, nine hundred ninety thousand, nine hundred ninety-nine".