99999079 has 2 divisors, whose sum is σ = 99999080. Its totient is φ = 99999078.

The previous prime is 99999077. The next prime is 99999089. The reversal of 99999079 is 97099999.

It is a weak prime.

It is an emirp because it is prime and its reverse (97099999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99999079 - 2¹ = 99999077 is a prime.

Together with 99999077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999539 + 49999540.

It is an arithmetic number, because the mean of its divisors is an integer number (49999540).

Almost surely, 2^99999079 is an apocalyptic number.

99999079 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999079 is an equidigital number, since it uses as much as digits as its factorization.

99999079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3720087, while the sum is 61.

The square root of 99999079 is about 9999.9539498940. The cubic root of 99999079 is about 464.1574583891.

The spelling of 99999079 in words is "ninety-nine million, nine hundred ninety-nine thousand, seventy-nine".