99897279898 has 8 divisors (see below), whose sum is σ = 161372529108. Its totient is φ = 46106436864.

The previous prime is 99897279863. The next prime is 99897279917. The reversal of 99897279898 is 89897279899.

It can be written as a sum of positive squares in 2 ways, for example, as 99434900889 + 462379009 = 315333^2 + 21503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921101511 + ... + 1921101562.

Almost surely, 2^99897279898 is an apocalyptic number.

99897279898 is a deficient number, since it is larger than the sum of its proper divisors (61475249210).

99897279898 is a wasteful number, since it uses less digits than its factorization.

99897279898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842203088.

The product of its digits is 2962842624, while the sum is 85.

Subtracting from 99897279898 its reverse (89897279899), we obtain a palindrome (9999999999).

The spelling of 99897279898 in words is "ninety-nine billion, eight hundred ninety-seven million, two hundred seventy-nine thousand, eight hundred ninety-eight".