8919973 has 4 divisors (see below), whose sum is σ = 8929228. Its totient is φ = 8910720.

The previous prime is 8919959. The next prime is 8919979. The reversal of 8919973 is 3799198.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6723649 + 2196324 = 2593^2 + 1482^2 .

It is a cyclic number.

It is not a de Polignac number, because 8919973 - 2⁵ = 8919941 is a prime.

It is a Duffinian number.

8919973 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8919979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2988 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (2232307).

Almost surely, 2^8919973 is an apocalyptic number.

It is an amenable number.

8919973 is a deficient number, since it is larger than the sum of its proper divisors (9255).

8919973 is a wasteful number, since it uses less digits than its factorization.

8919973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9254.

The product of its digits is 122472, while the sum is 46.

The square root of 8919973 is about 2986.6323844759. The cubic root of 8919973 is about 207.3900167136.

The spelling of 8919973 in words is "eight million, nine hundred nineteen thousand, nine hundred seventy-three".