8515973 has 4 divisors (see below), whose sum is σ = 8531820. Its totient is φ = 8500128.

The previous prime is 8515967. The next prime is 8515993. The reversal of 8515973 is 3795158.

8515973 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2765569 + 5750404 = 1663^2 + 2398^2 .

It is a cyclic number.

It is not a de Polignac number, because 8515973 - 2⁶ = 8515909 is a prime.

It is a super-2 number, since 2×8515973² = 145043592273458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8515993) 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, 7088 + ... + 8201.

It is an arithmetic number, because the mean of its divisors is an integer number (2132955).

Almost surely, 2^8515973 is an apocalyptic number.

It is an amenable number.

8515973 is a deficient number, since it is larger than the sum of its proper divisors (15847).

8515973 is a wasteful number, since it uses less digits than its factorization.

8515973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15846.

The product of its digits is 37800, while the sum is 38.

The square root of 8515973 is about 2918.2140086018. The cubic root of 8515973 is about 204.2105109411.

The spelling of 8515973 in words is "eight million, five hundred fifteen thousand, nine hundred seventy-three".