515693 has 2 divisors, whose sum is σ = 515694. Its totient is φ = 515692.

The previous prime is 515687. The next prime is 515701. The reversal of 515693 is 396515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515524 + 169 = 718^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 515693 - 2⁴ = 515677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257846 + 257847.

It is an arithmetic number, because the mean of its divisors is an integer number (257847).

2⁵¹⁵⁶⁹³ is an apocalyptic number.

It is an amenable number.

515693 is a deficient number, since it is larger than the sum of its proper divisors (1).

515693 is an equidigital number, since it uses as much as digits as its factorization.

515693 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 515693 is about 718.1176783787. The cubic root of 515693 is about 80.1918831428.

The spelling of 515693 in words is "five hundred fifteen thousand, six hundred ninety-three".