1000997 has 4 divisors (see below), whose sum is σ = 1024320. Its totient is φ = 977676.

The previous prime is 1000981. The next prime is 1000999. The reversal of 1000997 is 7990001.

1000997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000997 - 2⁴ = 1000981 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 (1000999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11597 + ... + 11682.

It is an arithmetic number, because the mean of its divisors is an integer number (256080).

2^1000997 is an apocalyptic number.

It is an amenable number.

1000997 is a deficient number, since it is larger than the sum of its proper divisors (23323).

1000997 is an equidigital number, since it uses as much as digits as its factorization.

1000997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 1000997 is about 1000.4983758108. The cubic root of 1000997 is about 100.0332222949.

Adding to 1000997 its reverse (7990001), we get a palindrome (8990998).

The spelling of 1000997 in words is "one million, nine hundred ninety-seven", and thus it is an aban number.