19040591 has 2 divisors, whose sum is σ = 19040592. Its totient is φ = 19040590.

The previous prime is 19040579. The next prime is 19040597. The reversal of 19040591 is 19504091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19040591 - 2¹⁰ = 19039567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19040597) 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, 9520295 + 9520296.

It is an arithmetic number, because the mean of its divisors is an integer number (9520296).

Almost surely, 2^19040591 is an apocalyptic number.

19040591 is a deficient number, since it is larger than the sum of its proper divisors (1).

19040591 is an equidigital number, since it uses as much as digits as its factorization.

19040591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 19040591 is about 4363.5525664302. The cubic root of 19040591 is about 267.0300526801.

The spelling of 19040591 in words is "nineteen million, forty thousand, five hundred ninety-one".