99244921 has 2 divisors, whose sum is σ = 99244922. Its totient is φ = 99244920.

The previous prime is 99244897. The next prime is 99244949. The reversal of 99244921 is 12944299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 9734400 = 9461^2 + 3120^2 .

It is an emirp because it is prime and its reverse (12944299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99244921 - 2¹³ = 99236729 is a prime.

It is not a weakly prime, because it can be changed into another prime (99254921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49622460 + 49622461.

It is an arithmetic number, because the mean of its divisors is an integer number (49622461).

Almost surely, 2^99244921 is an apocalyptic number.

It is an amenable number.

99244921 is a deficient number, since it is larger than the sum of its proper divisors (1).

99244921 is an equidigital number, since it uses as much as digits as its factorization.

99244921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 99244921 is about 9962.1745116214. The cubic root of 99244921 is about 462.9876751287.

The spelling of 99244921 in words is "ninety-nine million, two hundred forty-four thousand, nine hundred twenty-one".