198623671 has 6 divisors (see below), whose sum is σ = 200620016. Its totient is φ = 196647000.

The previous prime is 198623669. The next prime is 198623687. The reversal of 198623671 is 176326891.

It is not a de Polignac number, because 198623671 - 2¹ = 198623669 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 (198623471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 466 + ... + 19936.

Almost surely, 2^198623671 is an apocalyptic number.

198623671 is a deficient number, since it is larger than the sum of its proper divisors (1996345).

198623671 is an equidigital number, since it uses as much as digits as its factorization.

198623671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19673 (or 19572 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 198623671 is about 14093.3910397746. The cubic root of 198623671 is about 583.4589885136.

The spelling of 198623671 in words is "one hundred ninety-eight million, six hundred twenty-three thousand, six hundred seventy-one".