515369 has 2 divisors, whose sum is σ = 515370. Its totient is φ = 515368.

The previous prime is 515357. The next prime is 515371. The reversal of 515369 is 963515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473344 + 42025 = 688^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 515369 - 2¹⁶ = 449833 is a prime.

It is a super-2 number, since 2×515369² = 531210412322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 515371, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (515969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257684 + 257685.

It is an arithmetic number, because the mean of its divisors is an integer number (257685).

2⁵¹⁵³⁶⁹ is an apocalyptic number.

It is an amenable number.

515369 is a deficient number, since it is larger than the sum of its proper divisors (1).

515369 is an equidigital number, since it uses as much as digits as its factorization.

515369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 29.

The square root of 515369 is about 717.8920531668. The cubic root of 515369 is about 80.1750852847.

The spelling of 515369 in words is "five hundred fifteen thousand, three hundred sixty-nine".