723083447921 has 16 divisors (see below), whose sum is σ = 728890021440. Its totient is φ = 717305171520.

The previous prime is 723083447909. The next prime is 723083447929. The reversal of 723083447921 is 129744380327.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 723083447921 - 2¹⁸ = 723083185777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723083447921.

It is not an unprimeable number, because it can be changed into a prime (723083447929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87972950 + ... + 87981168.

It is an arithmetic number, because the mean of its divisors is an integer number (45555626340).

Almost surely, 2^723083447921 is an apocalyptic number.

It is an amenable number.

723083447921 is a deficient number, since it is larger than the sum of its proper divisors (5806573519).

723083447921 is a wasteful number, since it uses less digits than its factorization.

723083447921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 723083447921 in words is "seven hundred twenty-three billion, eighty-three million, four hundred forty-seven thousand, nine hundred twenty-one".