499723 has 4 divisors (see below), whose sum is σ = 571120. Its totient is φ = 428328.

The previous prime is 499717. The next prime is 499729. The reversal of 499723 is 327994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327994 = 2 ⋅163997.

It is an interprime number because it is at equal distance from previous prime (499717) and next prime (499729).

It is a cyclic number.

It is not a de Polignac number, because 499723 - 2⁵ = 499691 is a prime.

It is a Duffinian number.

499723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (499729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35688 + ... + 35701.

It is an arithmetic number, because the mean of its divisors is an integer number (142780).

2⁴⁹⁹⁷²³ is an apocalyptic number.

499723 is a deficient number, since it is larger than the sum of its proper divisors (71397).

499723 is an equidigital number, since it uses as much as digits as its factorization.

499723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71396.

The product of its digits is 13608, while the sum is 34.

The square root of 499723 is about 706.9108854728. The cubic root of 499723 is about 79.3553928879.

The spelling of 499723 in words is "four hundred ninety-nine thousand, seven hundred twenty-three".