1009897 has 4 divisors (see below), whose sum is σ = 1154176. Its totient is φ = 865620.

The previous prime is 1009873. The next prime is 1009901. The reversal of 1009897 is 7989001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7989001 = 1471 ⋅5431.

It is not a de Polignac number, because 1009897 - 2¹⁹ = 485609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009807) 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, 72129 + ... + 72142.

It is an arithmetic number, because the mean of its divisors is an integer number (288544).

2^1009897 is an apocalyptic number.

It is an amenable number.

1009897 is a deficient number, since it is larger than the sum of its proper divisors (144279).

1009897 is an equidigital number, since it uses as much as digits as its factorization.

1009897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144278.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1009897 is about 1004.9363163902. The cubic root of 1009897 is about 100.3288176048.

The spelling of 1009897 in words is "one million, nine thousand, eight hundred ninety-seven".