198671567 has 4 divisors (see below), whose sum is σ = 203291880. Its totient is φ = 194051256.

The previous prime is 198671533. The next prime is 198671569. The reversal of 198671567 is 765176891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765176891 = 41 ⋅18662851.

It is a cyclic number.

It is not a de Polignac number, because 198671567 - 2⁸ = 198671311 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 (198671569) 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, 2310092 + ... + 2310177.

It is an arithmetic number, because the mean of its divisors is an integer number (50822970).

Almost surely, 2^198671567 is an apocalyptic number.

198671567 is a deficient number, since it is larger than the sum of its proper divisors (4620313).

198671567 is an equidigital number, since it uses as much as digits as its factorization.

198671567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620312.

The product of its digits is 635040, while the sum is 50.

The square root of 198671567 is about 14095.0901735321. The cubic root of 198671567 is about 583.5058830682.

The spelling of 198671567 in words is "one hundred ninety-eight million, six hundred seventy-one thousand, five hundred sixty-seven".