9920775 has 48 divisors (see below), whose sum is σ = 17998848. Its totient is φ = 4800000.

The previous prime is 9920749. The next prime is 9920777. The reversal of 9920775 is 5770299.

It is not a de Polignac number, because 9920775 - 2⁶ = 9920711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39400 + ... + 39650.

It is an arithmetic number, because the mean of its divisors is an integer number (374976).

Almost surely, 2^9920775 is an apocalyptic number.

9920775 is a deficient number, since it is larger than the sum of its proper divisors (8078073).

9920775 is a wasteful number, since it uses less digits than its factorization.

9920775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 9920775 is about 3149.7261785749. The cubic root of 9920775 is about 214.8730095577.

The spelling of 9920775 in words is "nine million, nine hundred twenty thousand, seven hundred seventy-five".