9920873 has 2 divisors, whose sum is σ = 9920874. Its totient is φ = 9920872.

The previous prime is 9920863. The next prime is 9920881. The reversal of 9920873 is 3780299.

9920873 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., 6091024 + 3829849 = 2468^2 + 1957^2 .

It is a cyclic number.

It is not a de Polignac number, because 9920873 - 2¹⁰ = 9919849 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9920803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960436 + 4960437.

It is an arithmetic number, because the mean of its divisors is an integer number (4960437).

Almost surely, 2^9920873 is an apocalyptic number.

It is an amenable number.

9920873 is a deficient number, since it is larger than the sum of its proper divisors (1).

9920873 is an equidigital number, since it uses as much as digits as its factorization.

9920873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 9920873 is about 3149.7417354444. The cubic root of 9920873 is about 214.8737170792.

The spelling of 9920873 in words is "nine million, nine hundred twenty thousand, eight hundred seventy-three".