8520973394 has 4 divisors (see below), whose sum is σ = 12781460094. Its totient is φ = 4260486696.

The previous prime is 8520973387. The next prime is 8520973397. The reversal of 8520973394 is 4933790258.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 6219372769 + 2301600625 = 78863^2 + 47975^2 .

It is not an unprimeable number, because it can be changed into a prime (8520973397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2130243347 + ... + 2130243350.

Almost surely, 2^8520973394 is an apocalyptic number.

8520973394 is a deficient number, since it is larger than the sum of its proper divisors (4260486700).

8520973394 is a wasteful number, since it uses less digits than its factorization.

8520973394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260486699.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 8520973394 is about 92309.1186936589. The cubic root of 8520973394 is about 2042.5047244315.

The spelling of 8520973394 in words is "eight billion, five hundred twenty million, nine hundred seventy-three thousand, three hundred ninety-four".