323749 has 4 divisors (see below), whose sum is σ = 324940. Its totient is φ = 322560.

The previous prime is 323717. The next prime is 323759. The reversal of 323749 is 947323.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 947323 = 13 ⋅72871.

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 280900 = 207^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 323749 - 2⁵ = 323717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323759) 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, 37 + ... + 805.

It is an arithmetic number, because the mean of its divisors is an integer number (81235).

2³²³⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

323749 is a deficient number, since it is larger than the sum of its proper divisors (1191).

323749 is an equidigital number, since it uses as much as digits as its factorization.

323749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its digits is 4536, while the sum is 28.

The square root of 323749 is about 568.9894550868. The cubic root of 323749 is about 68.6651139666.

The spelling of 323749 in words is "three hundred twenty-three thousand, seven hundred forty-nine".