98998621 has 2 divisors, whose sum is σ = 98998622. Its totient is φ = 98998620.

The previous prime is 98998619. The next prime is 98998639. The reversal of 98998621 is 12689989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97732996 + 1265625 = 9886^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 98998621 - 2¹ = 98998619 is a prime.

Together with 98998619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98998651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49499310 + 49499311.

It is an arithmetic number, because the mean of its divisors is an integer number (49499311).

Almost surely, 2^98998621 is an apocalyptic number.

It is an amenable number.

98998621 is a deficient number, since it is larger than the sum of its proper divisors (1).

98998621 is an equidigital number, since it uses as much as digits as its factorization.

98998621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 52.

The square root of 98998621 is about 9949.8050734675. The cubic root of 98998621 is about 462.6043529811.

The spelling of 98998621 in words is "ninety-eight million, nine hundred ninety-eight thousand, six hundred twenty-one".