247723 has 8 divisors (see below), whose sum is σ = 290048. Its totient is φ = 207144.

The previous prime is 247717. The next prime is 247729. The reversal of 247723 is 327742.

It is an interprime number because it is at equal distance from previous prime (247717) and next prime (247729).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 247723 - 2⁵ = 247691 is a prime.

It is a super-2 number, since 2×247723² = 122733369458, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁷ + 4⁶ + 7⁶ + 7⁶ + 2¹³ + 3² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (36256).

2²⁴⁷⁷²³ is an apocalyptic number.

247723 is a deficient number, since it is larger than the sum of its proper divisors (42325).

247723 is an equidigital number, since it uses as much as digits as its factorization.

247723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873.

The product of its digits is 2352, while the sum is 25.

The square root of 247723 is about 497.7177915245. The cubic root of 247723 is about 62.8042128700.

It can be divided in two parts, 2477 and 23, that added together give a square (2500 = 50²).

The spelling of 247723 in words is "two hundred forty-seven thousand, seven hundred twenty-three", and thus it is an iban number.