99864829 has 2 divisors, whose sum is σ = 99864830. Its totient is φ = 99864828.

The previous prime is 99864797. The next prime is 99864833. The reversal of 99864829 is 92846899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94128804 + 5736025 = 9702^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 99864829 - 2⁵ = 99864797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99864829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99864329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49932414 + 49932415.

It is an arithmetic number, because the mean of its divisors is an integer number (49932415).

Almost surely, 2^99864829 is an apocalyptic number.

It is an amenable number.

99864829 is a deficient number, since it is larger than the sum of its proper divisors (1).

99864829 is an equidigital number, since it uses as much as digits as its factorization.

99864829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 55.

The square root of 99864829 is about 9993.2391645552. The cubic root of 99864829 is about 463.9496529919.

The spelling of 99864829 in words is "ninety-nine million, eight hundred sixty-four thousand, eight hundred twenty-nine".