921974573 has 16 divisors (see below), whose sum is σ = 1037245440. Its totient is φ = 813124224.

The previous prime is 921974569. The next prime is 921974587. The reversal of 921974573 is 375479129.

It is a cyclic number.

It is not a de Polignac number, because 921974573 - 2² = 921974569 is a prime.

It is a super-2 number, since 2×921974573² = 1700074226517064658, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921974593) 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, 523268 + ... + 525026.

It is an arithmetic number, because the mean of its divisors is an integer number (64827840).

Almost surely, 2^921974573 is an apocalyptic number.

It is an amenable number.

921974573 is a deficient number, since it is larger than the sum of its proper divisors (115270867).

921974573 is a wasteful number, since it uses less digits than its factorization.

921974573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548.

The product of its digits is 476280, while the sum is 47.

The square root of 921974573 is about 30364.0342016669. The cubic root of 921974573 is about 973.2841433696.

The spelling of 921974573 in words is "nine hundred twenty-one million, nine hundred seventy-four thousand, five hundred seventy-three".