617897 has 8 divisors (see below), whose sum is σ = 713856. Its totient is φ = 523872.

The previous prime is 617887. The next prime is 617917. The reversal of 617897 is 798716.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 617897 - 2¹⁸ = 355753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 617897.

It is not an unprimeable number, because it can be changed into a prime (617857) 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 7 ways as a sum of consecutive naturals, for example, 293 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (89232).

2⁶¹⁷⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

617897 is a deficient number, since it is larger than the sum of its proper divisors (95959).

617897 is a wasteful number, since it uses less digits than its factorization.

617897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967.

The product of its digits is 21168, while the sum is 38.

The square root of 617897 is about 786.0642467381. The cubic root of 617897 is about 85.1736702935.

The spelling of 617897 in words is "six hundred seventeen thousand, eight hundred ninety-seven".