509954 has 4 divisors (see below), whose sum is σ = 764934. Its totient is φ = 254976.

The previous prime is 509947. The next prime is 509959. The reversal of 509954 is 459905.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 286225 + 223729 = 535^2 + 473^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 509954.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127487 + ... + 127490.

2⁵⁰⁹⁹⁵⁴ is an apocalyptic number.

509954 is a deficient number, since it is larger than the sum of its proper divisors (254980).

509954 is a wasteful number, since it uses less digits than its factorization.

509954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254979.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 509954 is about 714.1106356861. The cubic root of 509954 is about 79.8932952395.

The spelling of 509954 in words is "five hundred nine thousand, nine hundred fifty-four".