2145321793 has 2 divisors, whose sum is σ = 2145321794. Its totient is φ = 2145321792.

The previous prime is 2145321791. The next prime is 2145321797. The reversal of 2145321793 is 3971235412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1145687104 + 999634689 = 33848^2 + 31617^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145321793 - 2¹ = 2145321791 is a prime.

Together with 2145321791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2145321791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072660896 + 1072660897.

It is an arithmetic number, because the mean of its divisors is an integer number (1072660897).

Almost surely, 2^2145321793 is an apocalyptic number.

It is an amenable number.

2145321793 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145321793 is an equidigital number, since it uses as much as digits as its factorization.

2145321793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 2145321793 is about 46317.6186024282. The cubic root of 2145321793 is about 1289.7260786898.

The spelling of 2145321793 in words is "two billion, one hundred forty-five million, three hundred twenty-one thousand, seven hundred ninety-three".