8500621249 has 4 divisors (see below), whose sum is σ = 8537104836. Its totient is φ = 8464137664.

The previous prime is 8500621211. The next prime is 8500621271. The reversal of 8500621249 is 9421260058.

8500621249 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 5415929649 + 3084691600 = 73593^2 + 55540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8500621249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8500621289) 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, 18241444 + ... + 18241909.

It is an arithmetic number, because the mean of its divisors is an integer number (2134276209).

Almost surely, 2^8500621249 is an apocalyptic number.

It is an amenable number.

8500621249 is a deficient number, since it is larger than the sum of its proper divisors (36483587).

8500621249 is a wasteful number, since it uses less digits than its factorization.

8500621249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36483586.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 8500621249 is about 92198.8137071188. The cubic root of 8500621249 is about 2040.8772698288.

The spelling of 8500621249 in words is "eight billion, five hundred million, six hundred twenty-one thousand, two hundred forty-nine".