98979999 has 4 divisors (see below), whose sum is σ = 131973336. Its totient is φ = 65986664.

The previous prime is 98979997. The next prime is 98980009. The reversal of 98979999 is 99997989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 98979999 - 2¹ = 98979997 is a prime.

98979999 is a modest number, since divided by 9999 gives 9897 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98979997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16496664 + ... + 16496669.

It is an arithmetic number, because the mean of its divisors is an integer number (32993334).

Almost surely, 2^98979999 is an apocalyptic number.

98979999 is a deficient number, since it is larger than the sum of its proper divisors (32993337).

98979999 is a wasteful number, since it uses less digits than its factorization.

98979999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32993336.

The product of its digits is 29760696, while the sum is 69.

The square root of 98979999 is about 9948.8692322294. The cubic root of 98979999 is about 462.5753453095.

The spelling of 98979999 in words is "ninety-eight million, nine hundred seventy-nine thousand, nine hundred ninety-nine".