198578713 has 4 divisors (see below), whose sum is σ = 202803840. Its totient is φ = 194353588.

The previous prime is 198578701. The next prime is 198578749. The reversal of 198578713 is 317875891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198578713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198579713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2112493 + ... + 2112586.

It is an arithmetic number, because the mean of its divisors is an integer number (50700960).

Almost surely, 2^198578713 is an apocalyptic number.

It is an amenable number.

198578713 is a deficient number, since it is larger than the sum of its proper divisors (4225127).

198578713 is an equidigital number, since it uses as much as digits as its factorization.

198578713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225126.

The product of its digits is 423360, while the sum is 49.

The square root of 198578713 is about 14091.7959465783. The cubic root of 198578713 is about 583.4149636693.

The spelling of 198578713 in words is "one hundred ninety-eight million, five hundred seventy-eight thousand, seven hundred thirteen".