2145323723 has 2 divisors, whose sum is σ = 2145323724. Its totient is φ = 2145323722.

The previous prime is 2145323699. The next prime is 2145323759. The reversal of 2145323723 is 3273235412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145323723 - 2³⁰ = 1071581899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145323723.

It is not a weakly prime, because it can be changed into another prime (2145323023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072661861 + 1072661862.

It is an arithmetic number, because the mean of its divisors is an integer number (1072661862).

Almost surely, 2^2145323723 is an apocalyptic number.

2145323723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145323723 is an equidigital number, since it uses as much as digits as its factorization.

2145323723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 32.

The square root of 2145323723 is about 46317.6394368280. The cubic root of 2145323723 is about 1289.7264654493.

The spelling of 2145323723 in words is "two billion, one hundred forty-five million, three hundred twenty-three thousand, seven hundred twenty-three".