509894 has 36 divisors (see below), whose sum is σ = 1000692. Its totient is φ = 194040.

The previous prime is 509879. The next prime is 509909. The reversal of 509894 is 498905.

509894 = T₁₃₂ + T₁₃₃ + ... + T₁₇₄.

It is an interprime number because it is at equal distance from previous prime (509879) and next prime (509909).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

509894 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11837 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (27797).

2⁵⁰⁹⁸⁹⁴ is an apocalyptic number.

509894 is a deficient number, since it is larger than the sum of its proper divisors (490798).

509894 is a wasteful number, since it uses less digits than its factorization.

509894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 509894 is about 714.0686241532. The cubic root of 509894 is about 79.8901617635.

The spelling of 509894 in words is "five hundred nine thousand, eight hundred ninety-four".