99988879 has 2 divisors, whose sum is σ = 99988880. Its totient is φ = 99988878.

The previous prime is 99988859. The next prime is 99988913. The reversal of 99988879 is 97888999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99988879 - 2⁹ = 99988367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99988829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994439 + 49994440.

It is an arithmetic number, because the mean of its divisors is an integer number (49994440).

Almost surely, 2^99988879 is an apocalyptic number.

99988879 is a deficient number, since it is larger than the sum of its proper divisors (1).

99988879 is an equidigital number, since it uses as much as digits as its factorization.

99988879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 67.

The square root of 99988879 is about 9999.4439345396. The cubic root of 99988879 is about 464.1416763536.

The spelling of 99988879 in words is "ninety-nine million, nine hundred eighty-eight thousand, eight hundred seventy-nine".