191680573939 has 2 divisors, whose sum is σ = 191680573940. Its totient is φ = 191680573938.

The previous prime is 191680573919. The next prime is 191680573979. The reversal of 191680573939 is 939375086191.

191680573939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191680573939 - 2⁵ = 191680573907 is a prime.

It is not a weakly prime, because it can be changed into another prime (191680573919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95840286969 + 95840286970.

It is an arithmetic number, because the mean of its divisors is an integer number (95840286970).

Almost surely, 2^191680573939 is an apocalyptic number.

191680573939 is a deficient number, since it is larger than the sum of its proper divisors (1).

191680573939 is an equidigital number, since it uses as much as digits as its factorization.

191680573939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11022480, while the sum is 61.

The spelling of 191680573939 in words is "one hundred ninety-one billion, six hundred eighty million, five hundred seventy-three thousand, nine hundred thirty-nine".