198490113 has 36 divisors (see below), whose sum is σ = 309238020. Its totient is φ = 122683968.

The previous prime is 198490099. The next prime is 198490129. The reversal of 198490113 is 311094891.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 109244304 + 89245809 = 10452^2 + 9447^2 .

It is not a de Polignac number, because 198490113 - 2⁵ = 198490081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198490183) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2962506 + ... + 2962572.

It is an arithmetic number, because the mean of its divisors is an integer number (8589945).

Almost surely, 2^198490113 is an apocalyptic number.

It is an amenable number.

198490113 is a deficient number, since it is larger than the sum of its proper divisors (110747907).

198490113 is an frugal number, since it uses more digits than its factorization.

198490113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 198490113 is about 14088.6519227355. The cubic root of 198490113 is about 583.3281832108.

The spelling of 198490113 in words is "one hundred ninety-eight million, four hundred ninety thousand, one hundred thirteen".