198613439 has 8 divisors (see below), whose sum is σ = 201355392. Its totient is φ = 195879960.

The previous prime is 198613391. The next prime is 198613453. The reversal of 198613439 is 934316891.

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

It is a cyclic number.

It is not a de Polignac number, because 198613439 - 2²⁴ = 181836223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198613439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198613469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55622 + ... + 59084.

It is an arithmetic number, because the mean of its divisors is an integer number (25169424).

Almost surely, 2^198613439 is an apocalyptic number.

198613439 is a deficient number, since it is larger than the sum of its proper divisors (2741953).

198613439 is an equidigital number, since it uses as much as digits as its factorization.

198613439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237.

The product of its digits is 139968, while the sum is 44.

The square root of 198613439 is about 14093.0280280712. The cubic root of 198613439 is about 583.4489694746.

The spelling of 198613439 in words is "one hundred ninety-eight million, six hundred thirteen thousand, four hundred thirty-nine".