515697 has 16 divisors (see below), whose sum is σ = 846720. Its totient is φ = 271872.

The previous prime is 515693. The next prime is 515701. The reversal of 515697 is 796515.

It is an interprime number because it is at equal distance from previous prime (515693) and next prime (515701).

It is not a de Polignac number, because 515697 - 2² = 515693 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (515693) 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 15 ways as a sum of consecutive naturals, for example, 672 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁵¹⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

515697 is a deficient number, since it is larger than the sum of its proper divisors (331023).

515697 is a wasteful number, since it uses less digits than its factorization.

515697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its digits is 9450, while the sum is 33.

The square root of 515697 is about 718.1204634321. The cubic root of 515697 is about 80.1920904798.

It can be divided in two parts, 5156 and 97, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 515697 in words is "five hundred fifteen thousand, six hundred ninety-seven".