984973621 has 4 divisors (see below), whose sum is σ = 985402144. Its totient is φ = 984545100.

The previous prime is 984973607. The next prime is 984973631. The reversal of 984973621 is 126379489.

984973621 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 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-984973621 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 (984973631) 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, 210795 + ... + 215416.

It is an arithmetic number, because the mean of its divisors is an integer number (246350536).

Almost surely, 2^984973621 is an apocalyptic number.

It is an amenable number.

984973621 is a deficient number, since it is larger than the sum of its proper divisors (428523).

984973621 is a wasteful number, since it uses less digits than its factorization.

984973621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428522.

The product of its digits is 653184, while the sum is 49.

The square root of 984973621 is about 31384.2893977225. The cubic root of 984973621 is about 994.9659074369.

The spelling of 984973621 in words is "nine hundred eighty-four million, nine hundred seventy-three thousand, six hundred twenty-one".