19008973 has 8 divisors (see below), whose sum is σ = 19323000. Its totient is φ = 18697728.

The previous prime is 19008947. The next prime is 19008989. The reversal of 19008973 is 37980091.

It can be written as a sum of positive squares in 4 ways, for example, as 2832489 + 16176484 = 1683^2 + 4022^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19008973 is a prime.

It is a super-2 number, since 2×19008973² = 722682109029458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19008173) 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 7 ways as a sum of consecutive naturals, for example, 16273 + ... + 17401.

It is an arithmetic number, because the mean of its divisors is an integer number (2415375).

Almost surely, 2^19008973 is an apocalyptic number.

It is an amenable number.

19008973 is a deficient number, since it is larger than the sum of its proper divisors (314027).

19008973 is a wasteful number, since it uses less digits than its factorization.

19008973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 19008973 is about 4359.9280957374. The cubic root of 19008973 is about 266.8821645209.

The spelling of 19008973 in words is "nineteen million, eight thousand, nine hundred seventy-three".