897149 has 4 divisors (see below), whose sum is σ = 978720. Its totient is φ = 815580.

The previous prime is 897137. The next prime is 897157. The reversal of 897149 is 941798.

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 897149 - 2⁴ = 897133 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 (897119) 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, 40769 + ... + 40790.

It is an arithmetic number, because the mean of its divisors is an integer number (244680).

2⁸⁹⁷¹⁴⁹ is an apocalyptic number.

It is an amenable number.

897149 is a deficient number, since it is larger than the sum of its proper divisors (81571).

897149 is a wasteful number, since it uses less digits than its factorization.

897149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81570.

The product of its digits is 18144, while the sum is 38.

The square root of 897149 is about 947.1794972443. The cubic root of 897149 is about 96.4468820934.

The spelling of 897149 in words is "eight hundred ninety-seven thousand, one hundred forty-nine".