99830561 has 2 divisors, whose sum is σ = 99830562. Its totient is φ = 99830560.

The previous prime is 99830527. The next prime is 99830573. The reversal of 99830561 is 16503899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84180625 + 15649936 = 9175^2 + 3956^2 .

It is a cyclic number.

It is not a de Polignac number, because 99830561 - 2²⁶ = 32721697 is a prime.

It is a super-2 number, since 2×99830561² = 19932281819149442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99830501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49915280 + 49915281.

It is an arithmetic number, because the mean of its divisors is an integer number (49915281).

Almost surely, 2^99830561 is an apocalyptic number.

It is an amenable number.

99830561 is a deficient number, since it is larger than the sum of its proper divisors (1).

99830561 is an equidigital number, since it uses as much as digits as its factorization.

99830561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 99830561 is about 9991.5244582596. The cubic root of 99830561 is about 463.8965797671.

The spelling of 99830561 in words is "ninety-nine million, eight hundred thirty thousand, five hundred sixty-one".