98738821 has 4 divisors (see below), whose sum is σ = 98761644. Its totient is φ = 98716000.

The previous prime is 98738807. The next prime is 98738837. The reversal of 98738821 is 12883789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12883789 = 43 ⋅299623.

It can be written as a sum of positive squares in 2 ways, for example, as 96530625 + 2208196 = 9825^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 98738821 - 2¹¹ = 98736773 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 (98738021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2710 + ... + 14311.

It is an arithmetic number, because the mean of its divisors is an integer number (24690411).

Almost surely, 2^98738821 is an apocalyptic number.

It is an amenable number.

98738821 is a deficient number, since it is larger than the sum of its proper divisors (22823).

98738821 is a wasteful number, since it uses less digits than its factorization.

98738821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22822.

The product of its digits is 193536, while the sum is 46.

The square root of 98738821 is about 9936.7409647228. The cubic root of 98738821 is about 462.1993308509.

The spelling of 98738821 in words is "ninety-eight million, seven hundred thirty-eight thousand, eight hundred twenty-one".