9921434 has 4 divisors (see below), whose sum is σ = 14882154. Its totient is φ = 4960716.

The previous prime is 9921409. The next prime is 9921449. The reversal of 9921434 is 4341299.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 9320809 + 600625 = 3053^2 + 775^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9921434.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2480357 + ... + 2480360.

Almost surely, 2^9921434 is an apocalyptic number.

9921434 is a deficient number, since it is larger than the sum of its proper divisors (4960720).

9921434 is a wasteful number, since it uses less digits than its factorization.

9921434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960719.

The product of its digits is 7776, while the sum is 32.

The square root of 9921434 is about 3149.8307891060. The cubic root of 9921434 is about 214.8777671893.

The spelling of 9921434 in words is "nine million, nine hundred twenty-one thousand, four hundred thirty-four".