505897 has 4 divisors (see below), whose sum is σ = 578176. Its totient is φ = 433620.

The previous prime is 505877. The next prime is 505907. The reversal of 505897 is 798505.

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, and also an emirpimes, since its reverse is a distinct semiprime: 798505 = 5 ⋅159701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505897 is a prime.

It is a Duffinian number.

505897 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (505867) 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, 36129 + ... + 36142.

It is an arithmetic number, because the mean of its divisors is an integer number (144544).

2⁵⁰⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

505897 is a deficient number, since it is larger than the sum of its proper divisors (72279).

505897 is an equidigital number, since it uses as much as digits as its factorization.

505897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72278.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 505897 is about 711.2643671660. The cubic root of 505897 is about 79.6808640123.

The spelling of 505897 in words is "five hundred five thousand, eight hundred ninety-seven".