8321913 has 8 divisors (see below), whose sum is σ = 12328800. Its totient is φ = 5547924.

The previous prime is 8321903. The next prime is 8321941. The reversal of 8321913 is 3191238.

8321913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8321913 - 2⁴ = 8321897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 308219 = 8321913 / (8 + 3 + 2 + 1 + 9 + 1 + 3).

It is not an unprimeable number, because it can be changed into a prime (8321903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154083 + ... + 154136.

It is an arithmetic number, because the mean of its divisors is an integer number (1541100).

Almost surely, 2^8321913 is an apocalyptic number.

It is an amenable number.

8321913 is a deficient number, since it is larger than the sum of its proper divisors (4006887).

8321913 is a wasteful number, since it uses less digits than its factorization.

8321913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308228 (or 308222 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 8321913 is about 2884.7726080230. The cubic root of 8321913 is about 202.6474098138.

The spelling of 8321913 in words is "eight million, three hundred twenty-one thousand, nine hundred thirteen".