721325423443 has 4 divisors (see below), whose sum is σ = 721339621120. Its totient is φ = 721311225768.

The previous prime is 721325423431. The next prime is 721325423447. The reversal of 721325423443 is 344324523127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344324523127 = 13 ⋅26486501779.

It is a cyclic number.

It is not a de Polignac number, because 721325423443 - 2²¹ = 721323326291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721325423396 and 721325423405.

It is not an unprimeable number, because it can be changed into a prime (721325423447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7022355 + ... + 7124332.

It is an arithmetic number, because the mean of its divisors is an integer number (180334905280).

Almost surely, 2^721325423443 is an apocalyptic number.

721325423443 is a deficient number, since it is larger than the sum of its proper divisors (14197677).

721325423443 is a wasteful number, since it uses less digits than its factorization.

721325423443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14197676.

The product of its digits is 483840, while the sum is 40.

The spelling of 721325423443 in words is "seven hundred twenty-one billion, three hundred twenty-five million, four hundred twenty-three thousand, four hundred forty-three".