99825689 has 2 divisors, whose sum is σ = 99825690. Its totient is φ = 99825688.

The previous prime is 99825637. The next prime is 99825731. The reversal of 99825689 is 98652899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97851664 + 1974025 = 9892^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 99825689 - 2⁸ = 99825433 is a prime.

It is not a weakly prime, because it can be changed into another prime (99825629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49912844 + 49912845.

It is an arithmetic number, because the mean of its divisors is an integer number (49912845).

Almost surely, 2^99825689 is an apocalyptic number.

It is an amenable number.

99825689 is a deficient number, since it is larger than the sum of its proper divisors (1).

99825689 is an equidigital number, since it uses as much as digits as its factorization.

99825689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 56.

The square root of 99825689 is about 9991.2806486456. The cubic root of 99825689 is about 463.8890331772.

The spelling of 99825689 in words is "ninety-nine million, eight hundred twenty-five thousand, six hundred eighty-nine".