9021997 has 6 divisors (see below), whose sum is σ = 9152682. Its totient is φ = 8893152.

The previous prime is 9021977. The next prime is 9022001. The reversal of 9021997 is 7991209.

It can be written as a sum of positive squares in 3 ways, for example, as 1371241 + 7650756 = 1171^2 + 2766^2 .

It is not a de Polignac number, because 9021997 - 2⁷ = 9021869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9021907) 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 5 ways as a sum of consecutive naturals, for example, 4483 + ... + 6175.

It is an arithmetic number, because the mean of its divisors is an integer number (1525447).

Almost surely, 2^9021997 is an apocalyptic number.

It is an amenable number.

9021997 is a deficient number, since it is larger than the sum of its proper divisors (130685).

9021997 is an equidigital number, since it uses as much as digits as its factorization.

9021997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 9021997 is about 3003.6639292704. The cubic root of 9021997 is about 208.1777096279.

The spelling of 9021997 in words is "nine million, twenty-one thousand, nine hundred ninety-seven".