9011997 has 12 divisors (see below), whose sum is σ = 13114140. Its totient is φ = 5963328.

The previous prime is 9011987. The next prime is 9012001. The reversal of 9011997 is 7991109.

It can be written as a sum of positive squares in 2 ways, for example, as 4639716 + 4372281 = 2154^2 + 2091^2 .

It is not a de Polignac number, because 9011997 - 2⁷ = 9011869 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9011987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2422 + ... + 4887.

It is an arithmetic number, because the mean of its divisors is an integer number (1092845).

Almost surely, 2^9011997 is an apocalyptic number.

It is an amenable number.

9011997 is a deficient number, since it is larger than the sum of its proper divisors (4102143).

9011997 is a wasteful number, since it uses less digits than its factorization.

9011997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452 (or 7449 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 9011997 is about 3001.9988341104. The cubic root of 9011997 is about 208.1007663259.

The spelling of 9011997 in words is "nine million, eleven thousand, nine hundred ninety-seven".