1942806191 has 2 divisors, whose sum is σ = 1942806192. Its totient is φ = 1942806190.

The previous prime is 1942806167. The next prime is 1942806289. The reversal of 1942806191 is 1916082491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1942806191 - 2⁶ = 1942806127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1942806991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971403095 + 971403096.

It is an arithmetic number, because the mean of its divisors is an integer number (971403096).

Almost surely, 2^1942806191 is an apocalyptic number.

1942806191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942806191 is an equidigital number, since it uses as much as digits as its factorization.

1942806191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1942806191 is about 44077.2752220461. The cubic root of 1942806191 is about 1247.7947659220.

The spelling of 1942806191 in words is "one billion, nine hundred forty-two million, eight hundred six thousand, one hundred ninety-one".