973942721 has 4 divisors (see below), whose sum is σ = 974006100. Its totient is φ = 973879344.

The previous prime is 973942693. The next prime is 973942763. The reversal of 973942721 is 127249379.

973942721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 127249379 = 907 ⋅140297.

It can be written as a sum of positive squares in 2 ways, for example, as 833188225 + 140754496 = 28865^2 + 11864^2 .

It is a cyclic number.

It is not a de Polignac number, because 973942721 - 2⁶ = 973942657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (973942621) 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, 7595 + ... + 44783.

It is an arithmetic number, because the mean of its divisors is an integer number (243501525).

Almost surely, 2^973942721 is an apocalyptic number.

It is an amenable number.

973942721 is a deficient number, since it is larger than the sum of its proper divisors (63379).

973942721 is a wasteful number, since it uses less digits than its factorization.

973942721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63378.

The product of its digits is 190512, while the sum is 44.

The square root of 973942721 is about 31208.0553863902. The cubic root of 973942721 is about 991.2376864459.

The spelling of 973942721 in words is "nine hundred seventy-three million, nine hundred forty-two thousand, seven hundred twenty-one".