9721974 has 8 divisors (see below), whose sum is σ = 19443960. Its totient is φ = 3240656.

The previous prime is 9721969. The next prime is 9721979. The reversal of 9721974 is 4791279.

It is an interprime number because it is at equal distance from previous prime (9721969) and next prime (9721979).

It is a sphenic number, since it is the product of 3 distinct primes.

9721974 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810159 + ... + 810170.

It is an arithmetic number, because the mean of its divisors is an integer number (2430495).

Almost surely, 2^9721974 is an apocalyptic number.

9721974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9721974 is a wasteful number, since it uses less digits than its factorization.

9721974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620334.

The product of its digits is 31752, while the sum is 39.

The square root of 9721974 is about 3118.0080179499. The cubic root of 9721974 is about 213.4280444260.

The spelling of 9721974 in words is "nine million, seven hundred twenty-one thousand, nine hundred seventy-four".