1098898198 has 4 divisors (see below), whose sum is σ = 1648347300. Its totient is φ = 549449098.

The previous prime is 1098898183. The next prime is 1098898201. The reversal of 1098898198 is 8918988901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8918988901 = 69313 ⋅128677.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274724548 + ... + 274724551.

It is an arithmetic number, because the mean of its divisors is an integer number (412086825).

Almost surely, 2^1098898198 is an apocalyptic number.

1098898198 is a deficient number, since it is larger than the sum of its proper divisors (549449102).

1098898198 is an equidigital number, since it uses as much as digits as its factorization.

1098898198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549449101.

The product of its (nonzero) digits is 2985984, while the sum is 61.

The square root of 1098898198 is about 33149.6334519705. The cubic root of 1098898198 is about 1031.9353432591.

The spelling of 1098898198 in words is "one billion, ninety-eight million, eight hundred ninety-eight thousand, one hundred ninety-eight".