9921494 has 32 divisors (see below), whose sum is σ = 16920576. Its totient is φ = 4324320.

The previous prime is 9921491. The next prime is 9921521. The reversal of 9921494 is 4941299.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9921491) 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, 78059 + ... + 78185.

It is an arithmetic number, because the mean of its divisors is an integer number (528768).

Almost surely, 2^9921494 is an apocalyptic number.

9921494 is a deficient number, since it is larger than the sum of its proper divisors (6999082).

9921494 is a wasteful number, since it uses less digits than its factorization.

9921494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 23328, while the sum is 38.

The square root of 9921494 is about 3149.8403134127. The cubic root of 9921494 is about 214.8782003471.

The spelling of 9921494 in words is "nine million, nine hundred twenty-one thousand, four hundred ninety-four".