19223009 has 16 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 16838976.

The previous prime is 19222999. The next prime is 19223023. The reversal of 19223009 is 90032291.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19223009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (19220009) 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 15 ways as a sum of consecutive naturals, for example, 71327 + ... + 71595.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^19223009 is an apocalyptic number.

It is an amenable number.

19223009 is a deficient number, since it is larger than the sum of its proper divisors (2549791).

19223009 is a wasteful number, since it uses less digits than its factorization.

19223009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 19223009 is about 4384.4052048140. The cubic root of 19223009 is about 267.8801024908.

The spelling of 19223009 in words is "nineteen million, two hundred twenty-three thousand, nine".