198374239823 has 2 divisors, whose sum is σ = 198374239824. Its totient is φ = 198374239822.

The previous prime is 198374239753. The next prime is 198374239879. The reversal of 198374239823 is 328932473891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198374239823 - 2³⁶ = 129654763087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198374239223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99187119911 + 99187119912.

It is an arithmetic number, because the mean of its divisors is an integer number (99187119912).

Almost surely, 2^198374239823 is an apocalyptic number.

198374239823 is a deficient number, since it is larger than the sum of its proper divisors (1).

198374239823 is an equidigital number, since it uses as much as digits as its factorization.

198374239823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 59.

The spelling of 198374239823 in words is "one hundred ninety-eight billion, three hundred seventy-four million, two hundred thirty-nine thousand, eight hundred twenty-three".