2147723442823 has 4 divisors (see below), whose sum is σ = 2454541077520. Its totient is φ = 1840905808128.

The previous prime is 2147723442817. The next prime is 2147723442857. The reversal of 2147723442823 is 3282443277412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2147723442823 - 2⁹ = 2147723442311 is a prime.

It is a super-2 number, since 2×2147723442823² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147723443823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153408817338 + ... + 153408817351.

It is an arithmetic number, because the mean of its divisors is an integer number (613635269380).

Almost surely, 2^{2147723442823} is an apocalyptic number.

2147723442823 is a deficient number, since it is larger than the sum of its proper divisors (306817634697).

2147723442823 is an equidigital number, since it uses as much as digits as its factorization.

2147723442823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306817634696.

The product of its digits is 3612672, while the sum is 49.

The spelling of 2147723442823 in words is "two trillion, one hundred forty-seven billion, seven hundred twenty-three million, four hundred forty-two thousand, eight hundred twenty-three".