9921974 has 4 divisors (see below), whose sum is σ = 14882964. Its totient is φ = 4960986.

The previous prime is 9921917. The next prime is 9921983. The reversal of 9921974 is 4791299.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2480492 + ... + 2480495.

It is an arithmetic number, because the mean of its divisors is an integer number (3720741).

Almost surely, 2^9921974 is an apocalyptic number.

9921974 is a deficient number, since it is larger than the sum of its proper divisors (4960990).

9921974 is a wasteful number, since it uses less digits than its factorization.

9921974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960989.

The product of its digits is 40824, while the sum is 41.

The square root of 9921974 is about 3149.9165068300. The cubic root of 9921974 is about 214.8816655467.

The spelling of 9921974 in words is "nine million, nine hundred twenty-one thousand, nine hundred seventy-four".