973500221 has 4 divisors (see below), whose sum is σ = 973654944. Its totient is φ = 973345500.

The previous prime is 973500181. The next prime is 973500247. The reversal of 973500221 is 122005379.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-973500221 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 (973500421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67505 + ... + 80646.

It is an arithmetic number, because the mean of its divisors is an integer number (243413736).

Almost surely, 2^973500221 is an apocalyptic number.

It is an amenable number.

973500221 is a deficient number, since it is larger than the sum of its proper divisors (154723).

973500221 is a wasteful number, since it uses less digits than its factorization.

973500221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154722.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 973500221 is about 31200.9650652027. The cubic root of 973500221 is about 991.0875444470.

The spelling of 973500221 in words is "nine hundred seventy-three million, five hundred thousand, two hundred twenty-one".