198591347 has 2 divisors, whose sum is σ = 198591348. Its totient is φ = 198591346.

The previous prime is 198591311. The next prime is 198591359. The reversal of 198591347 is 743195891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198591347 - 2⁸ = 198591091 is a prime.

It is not a weakly prime, because it can be changed into another prime (198591847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99295673 + 99295674.

It is an arithmetic number, because the mean of its divisors is an integer number (99295674).

Almost surely, 2^198591347 is an apocalyptic number.

198591347 is a deficient number, since it is larger than the sum of its proper divisors (1).

198591347 is an equidigital number, since it uses as much as digits as its factorization.

198591347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 198591347 is about 14092.2442144607. The cubic root of 198591347 is about 583.4273361071.

The spelling of 198591347 in words is "one hundred ninety-eight million, five hundred ninety-one thousand, three hundred forty-seven".