98819221 has 4 divisors (see below), whose sum is σ = 99316000. Its totient is φ = 98322444.

The previous prime is 98819213. The next prime is 98819243. The reversal of 98819221 is 12291889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12291889 = 971 ⋅12659.

It is a cyclic number.

It is not a de Polignac number, because 98819221 - 2³ = 98819213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98819321) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248091 + ... + 248488.

It is an arithmetic number, because the mean of its divisors is an integer number (24829000).

Almost surely, 2^98819221 is an apocalyptic number.

It is an amenable number.

98819221 is a deficient number, since it is larger than the sum of its proper divisors (496779).

98819221 is a wasteful number, since it uses less digits than its factorization.

98819221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496778.

The product of its digits is 20736, while the sum is 40.

The square root of 98819221 is about 9940.7857335323. The cubic root of 98819221 is about 462.3247484056.

The spelling of 98819221 in words is "ninety-eight million, eight hundred nineteen thousand, two hundred twenty-one".