897409 has 4 divisors (see below), whose sum is σ = 905904. Its totient is φ = 888916.

The previous prime is 897401. The next prime is 897433. The reversal of 897409 is 904798.

It is a happy number.

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 897409 - 2³ = 897401 is a prime.

It is a Duffinian number.

897409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (897401) 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, 4087 + ... + 4300.

It is an arithmetic number, because the mean of its divisors is an integer number (226476).

2⁸⁹⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

897409 is a deficient number, since it is larger than the sum of its proper divisors (8495).

897409 is a wasteful number, since it uses less digits than its factorization.

897409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8494.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 897409 is about 947.3167368943. The cubic root of 897409 is about 96.4561981852.

The spelling of 897409 in words is "eight hundred ninety-seven thousand, four hundred nine".