198259613 has 4 divisors (see below), whose sum is σ = 198754428. Its totient is φ = 197764800.

The previous prime is 198259597. The next prime is 198259637. The reversal of 198259613 is 316952891.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 169078009 + 29181604 = 13003^2 + 5402^2 .

It is a cyclic number.

It is not a de Polignac number, because 198259613 - 2⁴ = 198259597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198259673) 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, 246806 + ... + 247607.

It is an arithmetic number, because the mean of its divisors is an integer number (49688607).

Almost surely, 2^198259613 is an apocalyptic number.

It is an amenable number.

198259613 is a deficient number, since it is larger than the sum of its proper divisors (494815).

198259613 is an equidigital number, since it uses as much as digits as its factorization.

198259613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494814.

The product of its digits is 116640, while the sum is 44.

The square root of 198259613 is about 14080.4692038298. The cubic root of 198259613 is about 583.1022958443.

The spelling of 198259613 in words is "one hundred ninety-eight million, two hundred fifty-nine thousand, six hundred thirteen".