19142191 has 2 divisors, whose sum is σ = 19142192. Its totient is φ = 19142190.

The previous prime is 19142171. The next prime is 19142197. The reversal of 19142191 is 19124191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19142191 - 2⁹ = 19141679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19142197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9571095 + 9571096.

It is an arithmetic number, because the mean of its divisors is an integer number (9571096).

Almost surely, 2^19142191 is an apocalyptic number.

19142191 is a deficient number, since it is larger than the sum of its proper divisors (1).

19142191 is an equidigital number, since it uses as much as digits as its factorization.

19142191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 28.

The square root of 19142191 is about 4375.1789677681. The cubic root of 19142191 is about 267.5041650733.

The spelling of 19142191 in words is "nineteen million, one hundred forty-two thousand, one hundred ninety-one".