99424081 has 2 divisors, whose sum is σ = 99424082. Its totient is φ = 99424080.

The previous prime is 99424049. The next prime is 99424141. The reversal of 99424081 is 18042499.

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., 78411025 + 21013056 = 8855^2 + 4584^2 .

It is a cyclic number.

It is not a de Polignac number, because 99424081 - 2⁵ = 99424049 is a prime.

It is a super-2 number, since 2×99424081² = 19770295765389122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99424081.

It is not a weakly prime, because it can be changed into another prime (99424001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49712040 + 49712041.

It is an arithmetic number, because the mean of its divisors is an integer number (49712041).

Almost surely, 2^99424081 is an apocalyptic number.

It is an amenable number.

99424081 is a deficient number, since it is larger than the sum of its proper divisors (1).

99424081 is an equidigital number, since it uses as much as digits as its factorization.

99424081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 99424081 is about 9971.1624698427. The cubic root of 99424081 is about 463.2661075398.

The spelling of 99424081 in words is "ninety-nine million, four hundred twenty-four thousand, eighty-one".