98750021 has 2 divisors, whose sum is σ = 98750022. Its totient is φ = 98750020.

The previous prime is 98749999. The next prime is 98750051. The reversal of 98750021 is 12005789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98704225 + 45796 = 9935^2 + 214^2 .

It is an emirp because it is prime and its reverse (12005789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98750021 - 2¹⁰ = 98748997 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 98750021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98750051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49375010 + 49375011.

It is an arithmetic number, because the mean of its divisors is an integer number (49375011).

Almost surely, 2^98750021 is an apocalyptic number.

It is an amenable number.

98750021 is a deficient number, since it is larger than the sum of its proper divisors (1).

98750021 is an equidigital number, since it uses as much as digits as its factorization.

98750021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 98750021 is about 9937.3045138005. The cubic root of 98750021 is about 462.2168060336.

The spelling of 98750021 in words is "ninety-eight million, seven hundred fifty thousand, twenty-one".