98121990 has 16 divisors (see below), whose sum is σ = 235492848. Its totient is φ = 26165856.

The previous prime is 98121983. The next prime is 98122033. The reversal of 98121990 is 9912189.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1635337 + ... + 1635396.

It is an arithmetic number, because the mean of its divisors is an integer number (14718303).

Almost surely, 2^98121990 is an apocalyptic number.

98121990 is an abundant number, since it is smaller than the sum of its proper divisors (137370858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

98121990 is a wasteful number, since it uses less digits than its factorization.

98121990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270743.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 98121990 is about 9905.6544458203. The cubic root of 98121990 is about 461.2348516261.

The spelling of 98121990 in words is "ninety-eight million, one hundred twenty-one thousand, nine hundred ninety".