19042691 has 2 divisors, whose sum is σ = 19042692. Its totient is φ = 19042690.

The previous prime is 19042657. The next prime is 19042729. The reversal of 19042691 is 19624091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19042691 - 2¹⁴ = 19026307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19042591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9521345 + 9521346.

It is an arithmetic number, because the mean of its divisors is an integer number (9521346).

Almost surely, 2^19042691 is an apocalyptic number.

19042691 is a deficient number, since it is larger than the sum of its proper divisors (1).

19042691 is an equidigital number, since it uses as much as digits as its factorization.

19042691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19042691 is about 4363.7931894167. The cubic root of 19042691 is about 267.0398692959.

The spelling of 19042691 in words is "nineteen million, forty-two thousand, six hundred ninety-one".