• 515983² = 266238456289 is an anagram of the next square 515984² = 266239488256.

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515983 has 8 divisors (see below), whose sum is σ = 585200. Its totient is φ = 451008.

The previous prime is 515969. The next prime is 515993. The reversal of 515983 is 389515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 515983 - 2⁵ = 515951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 798 + ... + 1291.

It is an arithmetic number, because the mean of its divisors is an integer number (73150).

2⁵¹⁵⁹⁸³ is an apocalyptic number.

515983 is a deficient number, since it is larger than the sum of its proper divisors (69217).

515983 is a wasteful number, since it uses less digits than its factorization.

515983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121.

The product of its digits is 5400, while the sum is 31.

The square root of 515983 is about 718.3195667668. The cubic root of 515983 is about 80.2069122966.

The spelling of 515983 in words is "five hundred fifteen thousand, nine hundred eighty-three".