513943 has 2 divisors, whose sum is σ = 513944. Its totient is φ = 513942.

The previous prime is 513937. The next prime is 513977. The reversal of 513943 is 349315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513943 - 2⁹ = 513431 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256971 + 256972.

It is an arithmetic number, because the mean of its divisors is an integer number (256972).

2⁵¹³⁹⁴³ is an apocalyptic number.

513943 is a deficient number, since it is larger than the sum of its proper divisors (1).

513943 is an equidigital number, since it uses as much as digits as its factorization.

513943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 513943 is about 716.8981796601. The cubic root of 513943 is about 80.1010701731.

The spelling of 513943 in words is "five hundred thirteen thousand, nine hundred forty-three".