515797 has 4 divisors (see below), whose sum is σ = 546156. Its totient is φ = 485440.

The previous prime is 515783. The next prime is 515803. The reversal of 515797 is 797515.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 797515 = 5 ⋅159503.

It can be written as a sum of positive squares in 2 ways, for example, as 239121 + 276676 = 489^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 515797 - 2¹¹ = 513749 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 (515737) 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, 15154 + ... + 15187.

It is an arithmetic number, because the mean of its divisors is an integer number (136539).

2⁵¹⁵⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

515797 is a deficient number, since it is larger than the sum of its proper divisors (30359).

515797 is a wasteful number, since it uses less digits than its factorization.

515797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30358.

The product of its digits is 11025, while the sum is 34.

The square root of 515797 is about 718.1900862585. The cubic root of 515797 is about 80.1972735561.

The spelling of 515797 in words is "five hundred fifteen thousand, seven hundred ninety-seven".