897551 has 4 divisors (see below), whose sum is σ = 900000. Its totient is φ = 895104.

The previous prime is 897527. The next prime is 897553. The reversal of 897551 is 155798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155798 = 2 ⋅77899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897551 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 (897553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (225000).

2⁸⁹⁷⁵⁵¹ is an apocalyptic number.

897551 is a deficient number, since it is larger than the sum of its proper divisors (2449).

897551 is a wasteful number, since it uses less digits than its factorization.

897551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its digits is 12600, while the sum is 35.

The square root of 897551 is about 947.3916824630. The cubic root of 897551 is about 96.4612854448.

The spelling of 897551 in words is "eight hundred ninety-seven thousand, five hundred fifty-one".