973642821 has 16 divisors (see below), whose sum is σ = 1368076800. Its totient is φ = 614230128.

The previous prime is 973642811. The next prime is 973642841. The reversal of 973642821 is 128246379.

It is not a de Polignac number, because 973642821 - 2¹⁰ = 973641797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (973642811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43090 + ... + 61676.

It is an arithmetic number, because the mean of its divisors is an integer number (85504800).

Almost surely, 2^973642821 is an apocalyptic number.

It is an amenable number.

973642821 is a deficient number, since it is larger than the sum of its proper divisors (394433979).

973642821 is a wasteful number, since it uses less digits than its factorization.

973642821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19528.

The product of its digits is 145152, while the sum is 42.

The square root of 973642821 is about 31203.2501672502. The cubic root of 973642821 is about 991.1359341582.

The spelling of 973642821 in words is "nine hundred seventy-three million, six hundred forty-two thousand, eight hundred twenty-one".