99978098 has 16 divisors (see below), whose sum is σ = 164026944. Its totient is φ = 45326160.

The previous prime is 99978097. The next prime is 99978101. The reversal of 99978098 is 89087999.

It is not an unprimeable number, because it can be changed into a prime (99978097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3011 + ... + 14457.

It is an arithmetic number, because the mean of its divisors is an integer number (10251684).

Almost surely, 2^99978098 is an apocalyptic number.

99978098 is a deficient number, since it is larger than the sum of its proper divisors (64048846).

99978098 is a wasteful number, since it uses less digits than its factorization.

99978098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11857.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 99978098 is about 9998.9048400312. The cubic root of 99978098 is about 464.1249941941.

It can be divided in two parts, 999 and 78098, that added together give a palindrome (79097).

The spelling of 99978098 in words is "ninety-nine million, nine hundred seventy-eight thousand, ninety-eight".