723230203100621 has 4 divisors (see below), whose sum is σ = 723504882253692. Its totient is φ = 722955523947552.

The previous prime is 723230203100591. The next prime is 723230203100653. The reversal of 723230203100621 is 126001302032327.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 475269910070596 + 247960293030025 = 21800686^2 + 15746755^2 .

It is a cyclic number.

It is not a de Polignac number, because 723230203100621 - 2¹⁴ = 723230203084237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723230203150621) 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, 137339572586 + ... + 137339577851.

It is an arithmetic number, because the mean of its divisors is an integer number (180876220563423).

Almost surely, 2^{723230203100621} is an apocalyptic number.

It is an amenable number.

723230203100621 is a deficient number, since it is larger than the sum of its proper divisors (274679153071).

723230203100621 is a wasteful number, since it uses less digits than its factorization.

723230203100621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274679153070.

The product of its (nonzero) digits is 18144, while the sum is 32.

Adding to 723230203100621 its reverse (126001302032327), we get a palindrome (849231505132948).

The spelling of 723230203100621 in words is "seven hundred twenty-three trillion, two hundred thirty billion, two hundred three million, one hundred thousand, six hundred twenty-one".