2308321993 has 2 divisors, whose sum is σ = 2308321994. Its totient is φ = 2308321992.

The previous prime is 2308321991. The next prime is 2308322011. The reversal of 2308321993 is 3991238032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2247044409 + 61277584 = 47403^2 + 7828^2 .

It is a cyclic number.

It is not a de Polignac number, because 2308321993 - 2¹ = 2308321991 is a prime.

Together with 2308321991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2308321991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1154160996 + 1154160997.

It is an arithmetic number, because the mean of its divisors is an integer number (1154160997).

Almost surely, 2^2308321993 is an apocalyptic number.

It is an amenable number.

2308321993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2308321993 is an equidigital number, since it uses as much as digits as its factorization.

2308321993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 2308321993 is about 48044.9996669789. Note that the first 3 decimals coincide. The cubic root of 2308321993 is about 1321.5962463352.

The spelling of 2308321993 in words is "two billion, three hundred eight million, three hundred twenty-one thousand, nine hundred ninety-three".