99263821 has 2 divisors, whose sum is σ = 99263822. Its totient is φ = 99263820.

The previous prime is 99263819. The next prime is 99263863. The reversal of 99263821 is 12836299.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 13793796 = 9245^2 + 3714^2 .

It is a cyclic number.

It is not a de Polignac number, because 99263821 - 2¹ = 99263819 is a prime.

Together with 99263819, 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 (99263621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49631910 + 49631911.

It is an arithmetic number, because the mean of its divisors is an integer number (49631911).

Almost surely, 2^99263821 is an apocalyptic number.

It is an amenable number.

99263821 is a deficient number, since it is larger than the sum of its proper divisors (1).

99263821 is an equidigital number, since it uses as much as digits as its factorization.

99263821 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 99263821 is about 9963.1230545447. The cubic root of 99263821 is about 463.0170634056.

The spelling of 99263821 in words is "ninety-nine million, two hundred sixty-three thousand, eight hundred twenty-one".