974017921 has 4 divisors (see below), whose sum is σ = 977808132. Its totient is φ = 970227712.

The previous prime is 974017909. The next prime is 974017931. The reversal of 974017921 is 129710479.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 735006321 + 239011600 = 27111^2 + 15460^2 .

It is a cyclic number.

It is not a de Polignac number, because 974017921 - 2¹⁵ = 973985153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (974017931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894720 + ... + 1895233.

It is an arithmetic number, because the mean of its divisors is an integer number (244452033).

Almost surely, 2^974017921 is an apocalyptic number.

It is an amenable number.

974017921 is a deficient number, since it is larger than the sum of its proper divisors (3790211).

974017921 is a wasteful number, since it uses less digits than its factorization.

974017921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790210.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 974017921 is about 31209.2601802734. The cubic root of 974017921 is about 991.2631975819.

The spelling of 974017921 in words is "nine hundred seventy-four million, seventeen thousand, nine hundred twenty-one".