198792031271 has 2 divisors, whose sum is σ = 198792031272. Its totient is φ = 198792031270.

The previous prime is 198792031213. The next prime is 198792031337. The reversal of 198792031271 is 172130297891.

It is a weak prime.

It is an emirp because it is prime and its reverse (172130297891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198792031271 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198792031201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99396015635 + 99396015636.

It is an arithmetic number, because the mean of its divisors is an integer number (99396015636).

Almost surely, 2^198792031271 is an apocalyptic number.

198792031271 is a deficient number, since it is larger than the sum of its proper divisors (1).

198792031271 is an equidigital number, since it uses as much as digits as its factorization.

198792031271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 50.

Adding to 198792031271 its sum of digits (50), we get a square (198792031321 = 445861²).

The spelling of 198792031271 in words is "one hundred ninety-eight billion, seven hundred ninety-two million, thirty-one thousand, two hundred seventy-one".