509694 has 32 divisors (see below), whose sum is σ = 1140480. Its totient is φ = 150912.

The previous prime is 509693. The next prime is 509699. The reversal of 509694 is 496905.

It is a happy number.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 509694.

It is not an unprimeable number, because it can be changed into a prime (509693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1807 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (35640).

2⁵⁰⁹⁶⁹⁴ is an apocalyptic number.

509694 is an abundant number, since it is smaller than the sum of its proper divisors (630786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

509694 is a wasteful number, since it uses less digits than its factorization.

509694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 509694 is about 713.9285678554. The cubic root of 509694 is about 79.8797150682.

The spelling of 509694 in words is "five hundred nine thousand, six hundred ninety-four".