515923 has 2 divisors, whose sum is σ = 515924. Its totient is φ = 515922.

The previous prime is 515917. The next prime is 515929. The reversal of 515923 is 329515.

It is a balanced prime because it is at equal distance from previous prime (515917) and next prime (515929).

It is a cyclic number.

It is not a de Polignac number, because 515923 - 2¹⁷ = 384851 is a 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, 257961 + 257962.

It is an arithmetic number, because the mean of its divisors is an integer number (257962).

2⁵¹⁵⁹²³ is an apocalyptic number.

515923 is a deficient number, since it is larger than the sum of its proper divisors (1).

515923 is an equidigital number, since it uses as much as digits as its factorization.

515923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 25.

The square root of 515923 is about 718.2778014111. The cubic root of 515923 is about 80.2038032786.

The spelling of 515923 in words is "five hundred fifteen thousand, nine hundred twenty-three".