99986279 has 2 divisors, whose sum is σ = 99986280. Its totient is φ = 99986278.

The previous prime is 99986273. The next prime is 99986329. The reversal of 99986279 is 97268999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99986279 - 2⁸ = 99986023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99986273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993139 + 49993140.

It is an arithmetic number, because the mean of its divisors is an integer number (49993140).

Almost surely, 2^99986279 is an apocalyptic number.

99986279 is a deficient number, since it is larger than the sum of its proper divisors (1).

99986279 is an equidigital number, since it uses as much as digits as its factorization.

99986279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 59.

The square root of 99986279 is about 9999.3139264652. The cubic root of 99986279 is about 464.1376533101.

It can be divided in two parts, 999 and 86279, that added together give a palindrome (87278).

The spelling of 99986279 in words is "ninety-nine million, nine hundred eighty-six thousand, two hundred seventy-nine".