515969 has 2 divisors, whose sum is σ = 515970. Its totient is φ = 515968.

The previous prime is 515951. The next prime is 515993. The reversal of 515969 is 969515.

515969 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506944 + 9025 = 712^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 515969 - 2¹² = 511873 is a prime.

It is a super-2 number, since 2×515969² = 532448017922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (515929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257984 + 257985.

It is an arithmetic number, because the mean of its divisors is an integer number (257985).

2⁵¹⁵⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

515969 is a deficient number, since it is larger than the sum of its proper divisors (1).

515969 is an equidigital number, since it uses as much as digits as its factorization.

515969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150, while the sum is 35.

The square root of 515969 is about 718.3098217343. The cubic root of 515969 is about 80.2061868806.

The spelling of 515969 in words is "five hundred fifteen thousand, nine hundred sixty-nine".