9921473 has 2 divisors, whose sum is σ = 9921474. Its totient is φ = 9921472.

The previous prime is 9921449. The next prime is 9921479. The reversal of 9921473 is 3741299.

9921473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8133904 + 1787569 = 2852^2 + 1337^2 .

It is an emirp because it is prime and its reverse (3741299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9921473 - 2⁶ = 9921409 is a prime.

It is a d-powerful number, because it can be written as 9³ + 9⁶ + 2²³ + 1 + 4 + 7⁷ + 3¹¹ .

It is equal to p₆₅₉₇₆₂ and since 9921473 and 659762 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (9921479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960736 + 4960737.

It is an arithmetic number, because the mean of its divisors is an integer number (4960737).

Almost surely, 2^9921473 is an apocalyptic number.

It is an amenable number.

9921473 is a deficient number, since it is larger than the sum of its proper divisors (1).

9921473 is an equidigital number, since it uses as much as digits as its factorization.

9921473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 9921473 is about 3149.8369799086. The cubic root of 9921473 is about 214.8780487420.

The spelling of 9921473 in words is "nine million, nine hundred twenty-one thousand, four hundred seventy-three".