499689 has 20 divisors (see below), whose sum is σ = 774400. Its totient is φ = 320760.

The previous prime is 499687. The next prime is 499691. The reversal of 499689 is 986994.

It is an interprime number because it is at equal distance from previous prime (499687) and next prime (499691).

It is not a de Polignac number, because 499689 - 2¹ = 499687 is a prime.

It is a Duffinian number.

499689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (499687) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2412 + ... + 2610.

It is an arithmetic number, because the mean of its divisors is an integer number (38720).

2⁴⁹⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

499689 is a deficient number, since it is larger than the sum of its proper divisors (274711).

499689 is a wasteful number, since it uses less digits than its factorization.

499689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 233 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 499689 is about 706.8868367709. The cubic root of 499689 is about 79.3535931278.

The spelling of 499689 in words is "four hundred ninety-nine thousand, six hundred eighty-nine".