99141821 has 2 divisors, whose sum is σ = 99141822. Its totient is φ = 99141820.

The previous prime is 99141781. The next prime is 99141863. The reversal of 99141821 is 12814199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 20376196 = 8875^2 + 4514^2 .

It is an emirp because it is prime and its reverse (12814199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99141821 - 2¹⁴ = 99125437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99141421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49570910 + 49570911.

It is an arithmetic number, because the mean of its divisors is an integer number (49570911).

Almost surely, 2^99141821 is an apocalyptic number.

It is an amenable number.

99141821 is a deficient number, since it is larger than the sum of its proper divisors (1).

99141821 is an equidigital number, since it uses as much as digits as its factorization.

99141821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 35.

The square root of 99141821 is about 9956.9985939539. The cubic root of 99141821 is about 462.8272955755.

The spelling of 99141821 in words is "ninety-nine million, one hundred forty-one thousand, eight hundred twenty-one".