198728792294423 has 2 divisors, whose sum is σ = 198728792294424. Its totient is φ = 198728792294422.

The previous prime is 198728792294369. The next prime is 198728792294429. The reversal of 198728792294423 is 324492297827891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198728792294423 - 2²⁸ = 198728523858967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198728792294429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99364396147211 + 99364396147212.

It is an arithmetic number, because the mean of its divisors is an integer number (99364396147212).

Almost surely, 2^{198728792294423} is an apocalyptic number.

198728792294423 is a deficient number, since it is larger than the sum of its proper divisors (1).

198728792294423 is an equidigital number, since it uses as much as digits as its factorization.

198728792294423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1755758592, while the sum is 77.

The spelling of 198728792294423 in words is "one hundred ninety-eight trillion, seven hundred twenty-eight billion, seven hundred ninety-two million, two hundred ninety-four thousand, four hundred twenty-three".