99842579 has 2 divisors, whose sum is σ = 99842580. Its totient is φ = 99842578.

The previous prime is 99842557. The next prime is 99842591. The reversal of 99842579 is 97524899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99842579 - 2¹⁶ = 99777043 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99842579.

It is not a weakly prime, because it can be changed into another prime (99812579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49921289 + 49921290.

It is an arithmetic number, because the mean of its divisors is an integer number (49921290).

Almost surely, 2^99842579 is an apocalyptic number.

99842579 is a deficient number, since it is larger than the sum of its proper divisors (1).

99842579 is an equidigital number, since it uses as much as digits as its factorization.

99842579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 99842579 is about 9992.1258498880. The cubic root of 99842579 is about 463.9151942586.

The spelling of 99842579 in words is "ninety-nine million, eight hundred forty-two thousand, five hundred seventy-nine".