192806191993 has 2 divisors, whose sum is σ = 192806191994. Its totient is φ = 192806191992.

The previous prime is 192806191961. The next prime is 192806192041. The reversal of 192806191993 is 399191608291.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102510749929 + 90295442064 = 320173^2 + 300492^2 .

It is a cyclic number.

It is not a de Polignac number, because 192806191993 - 2⁵ = 192806191961 is a prime.

It is not a weakly prime, because it can be changed into another prime (192806191913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96403095996 + 96403095997.

It is an arithmetic number, because the mean of its divisors is an integer number (96403095997).

Almost surely, 2^192806191993 is an apocalyptic number.

It is an amenable number.

192806191993 is a deficient number, since it is larger than the sum of its proper divisors (1).

192806191993 is an equidigital number, since it uses as much as digits as its factorization.

192806191993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1889568, while the sum is 58.

The spelling of 192806191993 in words is "one hundred ninety-two billion, eight hundred six million, one hundred ninety-one thousand, nine hundred ninety-three".