249673 has 4 divisors (see below), whose sum is σ = 253828. Its totient is φ = 245520.

The previous prime is 249671. The next prime is 249677. The reversal of 249673 is 376942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45369 + 204304 = 213^2 + 452^2 .

It is a cyclic number.

It is not a de Polignac number, because 249673 - 2¹ = 249671 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 4 + 6³ + 9³ + 7⁶ + 3 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986 + ... + 2107.

It is an arithmetic number, because the mean of its divisors is an integer number (63457).

249673 is a Friedman number, since it can be written as (2-9*7)*(3-4^6), using all its digits and the basic arithmetic operations.

2²⁴⁹⁶⁷³ is an apocalyptic number.

It is an amenable number.

249673 is a deficient number, since it is larger than the sum of its proper divisors (4155).

249673 is an equidigital number, since it uses as much as digits as its factorization.

249673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154.

The product of its digits is 9072, while the sum is 31.

The square root of 249673 is about 499.6728930010. The cubic root of 249673 is about 62.9685742318.

The spelling of 249673 in words is "two hundred forty-nine thousand, six hundred seventy-three".