19042997 has 4 divisors (see below), whose sum is σ = 20045280. Its totient is φ = 18040716.

The previous prime is 19042987. The next prime is 19043027. The reversal of 19042997 is 79924091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19042997 - 2¹⁴ = 19026613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19042927) 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 in 3 ways as a sum of consecutive naturals, for example, 501113 + ... + 501150.

It is an arithmetic number, because the mean of its divisors is an integer number (5011320).

Almost surely, 2^19042997 is an apocalyptic number.

It is an amenable number.

19042997 is a deficient number, since it is larger than the sum of its proper divisors (1002283).

19042997 is a wasteful number, since it uses less digits than its factorization.

19042997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002282.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 19042997 is about 4363.8282505158. The cubic root of 19042997 is about 267.0412996568.

The spelling of 19042997 in words is "nineteen million, forty-two thousand, nine hundred ninety-seven".