98000021 has 16 divisors (see below), whose sum is σ = 117808128. Its totient is φ = 79747200.

The previous prime is 97999949. The next prime is 98000027. The reversal of 98000021 is 12000089.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97999957 and 98000002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98000027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7241 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (7363008).

Almost surely, 2^98000021 is an apocalyptic number.

It is an amenable number.

98000021 is a deficient number, since it is larger than the sum of its proper divisors (19808107).

98000021 is a wasteful number, since it uses less digits than its factorization.

98000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8612.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 98000021 is about 9899.4959972718. The cubic root of 98000021 is about 461.0436621375.

The spelling of 98000021 in words is "ninety-eight million, twenty-one", and thus it is an aban number and an uban number.