40723 has 4 divisors (see below), whose sum is σ = 41128. Its totient is φ = 40320.

The previous prime is 40709. The next prime is 40739. The reversal of 40723 is 32704.

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.

It is a cyclic number.

It is not a de Polignac number, because 40723 - 2¹³ = 32531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40697 and 40706.

It is not an unprimeable number, because it can be changed into a prime (40763) 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, 88 + ... + 298.

It is an arithmetic number, because the mean of its divisors is an integer number (10282).

2⁴⁰⁷²³ is an apocalyptic number.

40723 is a deficient number, since it is larger than the sum of its proper divisors (405).

40723 is a wasteful number, since it uses less digits than its factorization.

40723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 40723 is about 201.7994053510. The cubic root of 40723 is about 34.4043418893.

It can be divided in two parts, 40 and 723, that multiplied together give a triangular number (28920 = T₂₄₀).

The spelling of 40723 in words is "forty thousand, seven hundred twenty-three", and thus it is an iban number.