8502836921 has 4 divisors (see below), whose sum is σ = 8538118644. Its totient is φ = 8467555200.

The previous prime is 8502836893. The next prime is 8502836939. The reversal of 8502836921 is 1296382058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1296382058 = 2 ⋅648191029.

It can be written as a sum of positive squares in 2 ways, for example, as 7280355625 + 1222481296 = 85325^2 + 34964^2 .

It is a cyclic number.

It is not a de Polignac number, because 8502836921 - 2¹⁰ = 8502835897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8502836941) 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, 17640500 + ... + 17640981.

It is an arithmetic number, because the mean of its divisors is an integer number (2134529661).

Almost surely, 2^8502836921 is an apocalyptic number.

It is an amenable number.

8502836921 is a deficient number, since it is larger than the sum of its proper divisors (35281723).

8502836921 is a wasteful number, since it uses less digits than its factorization.

8502836921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35281722.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 8502836921 is about 92210.8286536890. The cubic root of 8502836921 is about 2041.0545714506.

The spelling of 8502836921 in words is "eight billion, five hundred two million, eight hundred thirty-six thousand, nine hundred twenty-one".