517949 has 2 divisors, whose sum is σ = 517950. Its totient is φ = 517948.

The previous prime is 517931. The next prime is 517967. The reversal of 517949 is 949715.

It is a balanced prime because it is at equal distance from previous prime (517931) and next prime (517967).

It can be written as a sum of positive squares in only one way, i.e., 511225 + 6724 = 715^2 + 82^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258974 + 258975.

It is an arithmetic number, because the mean of its divisors is an integer number (258975).

2⁵¹⁷⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

517949 is a deficient number, since it is larger than the sum of its proper divisors (1).

517949 is an equidigital number, since it uses as much as digits as its factorization.

517949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 35.

The square root of 517949 is about 719.6867374073. The cubic root of 517949 is about 80.3086513975.

It can be divided in two parts, 51 and 7949, that added together give a cube (8000 = 20³).

The spelling of 517949 in words is "five hundred seventeen thousand, nine hundred forty-nine".