9800221973 has 2 divisors, whose sum is σ = 9800221974. Its totient is φ = 9800221972.

The previous prime is 9800221957. The next prime is 9800222009. The reversal of 9800221973 is 3791220089.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6162564004 + 3637657969 = 78502^2 + 60313^2 .

It is a cyclic number.

It is not a de Polignac number, because 9800221973 - 2⁴ = 9800221957 is a prime.

It is a super-3 number, since 3×9800221973³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9800221973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9800221903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4900110986 + 4900110987.

It is an arithmetic number, because the mean of its divisors is an integer number (4900110987).

Almost surely, 2^9800221973 is an apocalyptic number.

It is an amenable number.

9800221973 is a deficient number, since it is larger than the sum of its proper divisors (1).

9800221973 is an equidigital number, since it uses as much as digits as its factorization.

9800221973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 9800221973 is about 98996.0704927221. The cubic root of 9800221973 is about 2139.9911180375.

The spelling of 9800221973 in words is "nine billion, eight hundred million, two hundred twenty-one thousand, nine hundred seventy-three".