191797204867 has 2 divisors, whose sum is σ = 191797204868. Its totient is φ = 191797204866.

The previous prime is 191797204831. The next prime is 191797204873. The reversal of 191797204867 is 768402797191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191797204867 - 2²³ = 191788816259 is a prime.

It is not a weakly prime, because it can be changed into another prime (191797204877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95898602433 + 95898602434.

It is an arithmetic number, because the mean of its divisors is an integer number (95898602434).

Almost surely, 2^191797204867 is an apocalyptic number.

191797204867 is a deficient number, since it is larger than the sum of its proper divisors (1).

191797204867 is an equidigital number, since it uses as much as digits as its factorization.

191797204867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 61.

The spelling of 191797204867 in words is "one hundred ninety-one billion, seven hundred ninety-seven million, two hundred four thousand, eight hundred sixty-seven".