19045399 has 6 divisors (see below), whose sum is σ = 19325840. Its totient is φ = 18766020.

The previous prime is 19045349. The next prime is 19045447. The reversal of 19045399 is 99354091.

It is not a de Polignac number, because 19045399 - 2⁹ = 19044887 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 (19045349) 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 5 ways as a sum of consecutive naturals, for example, 38544 + ... + 39034.

Almost surely, 2^19045399 is an apocalyptic number.

19045399 is a deficient number, since it is larger than the sum of its proper divisors (280441).

19045399 is an frugal number, since it uses more digits than its factorization.

19045399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 19045399 is about 4364.1034589020. The cubic root of 19045399 is about 267.0525269903.

The spelling of 19045399 in words is "nineteen million, forty-five thousand, three hundred ninety-nine".