8321013913 has 2 divisors, whose sum is σ = 8321013914. Its totient is φ = 8321013912.

The previous prime is 8321013907. The next prime is 8321013931. The reversal of 8321013913 is 3193101238.

Together with next prime (8321013931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5614205184 + 2706808729 = 74928^2 + 52027^2 .

It is a cyclic number.

It is not a de Polignac number, because 8321013913 - 2²⁹ = 7784143001 is a prime.

It is not a weakly prime, because it can be changed into another prime (8321013013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4160506956 + 4160506957.

It is an arithmetic number, because the mean of its divisors is an integer number (4160506957).

Almost surely, 2^8321013913 is an apocalyptic number.

It is an amenable number.

8321013913 is a deficient number, since it is larger than the sum of its proper divisors (1).

8321013913 is an equidigital number, since it uses as much as digits as its factorization.

8321013913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 8321013913 is about 91219.5917169113. The cubic root of 8321013913 is about 2026.4011164356.

The spelling of 8321013913 in words is "eight billion, three hundred twenty-one million, thirteen thousand, nine hundred thirteen".