98989879 has 2 divisors, whose sum is σ = 98989880. Its totient is φ = 98989878.

The previous prime is 98989843. The next prime is 98989889. The reversal of 98989879 is 97898989.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 98989879 - 2⁹ = 98989367 is a prime.

It is a super-2 number, since 2×98989879² = 19597992288869282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98989819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49494939 + 49494940.

It is an arithmetic number, because the mean of its divisors is an integer number (49494940).

Almost surely, 2^98989879 is an apocalyptic number.

98989879 is a deficient number, since it is larger than the sum of its proper divisors (1).

98989879 is an equidigital number, since it uses as much as digits as its factorization.

98989879 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 98989879 is about 9949.3657586803. The cubic root of 98989879 is about 462.5907359353.

The spelling of 98989879 in words is "ninety-eight million, nine hundred eighty-nine thousand, eight hundred seventy-nine".