897659 has 4 divisors (see below), whose sum is σ = 1025904. Its totient is φ = 769416.

The previous prime is 897649. The next prime is 897671. The reversal of 897659 is 956798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956798 = 2 ⋅478399.

It is a cyclic number.

It is not a de Polignac number, because 897659 - 2¹⁶ = 832123 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 897659.

It is not an unprimeable number, because it can be changed into a prime (897629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64112 + ... + 64125.

It is an arithmetic number, because the mean of its divisors is an integer number (256476).

2⁸⁹⁷⁶⁵⁹ is an apocalyptic number.

897659 is a deficient number, since it is larger than the sum of its proper divisors (128245).

897659 is a wasteful number, since it uses less digits than its factorization.

897659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128244.

The product of its digits is 136080, while the sum is 44.

The square root of 897659 is about 947.4486793489. The cubic root of 897659 is about 96.4651542690.

The spelling of 897659 in words is "eight hundred ninety-seven thousand, six hundred fifty-nine".