191422883887 has 2 divisors, whose sum is σ = 191422883888. Its totient is φ = 191422883886.

The previous prime is 191422883879. The next prime is 191422883933. The reversal of 191422883887 is 788388224191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191422883887 - 2³ = 191422883879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191422883857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95711441943 + 95711441944.

It is an arithmetic number, because the mean of its divisors is an integer number (95711441944).

Almost surely, 2^191422883887 is an apocalyptic number.

191422883887 is a deficient number, since it is larger than the sum of its proper divisors (1).

191422883887 is an equidigital number, since it uses as much as digits as its factorization.

191422883887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12386304, while the sum is 61.

The spelling of 191422883887 in words is "one hundred ninety-one billion, four hundred twenty-two million, eight hundred eighty-three thousand, eight hundred eighty-seven".