4000723 has 2 divisors, whose sum is σ = 4000724. Its totient is φ = 4000722.

The previous prime is 4000709. The next prime is 4000741. The reversal of 4000723 is 3270004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4000723 - 2⁵ = 4000691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4000697 and 4000706.

It is not a weakly prime, because it can be changed into another prime (4000523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000361 + 2000362.

It is an arithmetic number, because the mean of its divisors is an integer number (2000362).

Almost surely, 2^4000723 is an apocalyptic number.

4000723 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000723 is an equidigital number, since it uses as much as digits as its factorization.

4000723 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4000723 is about 2000.1807418331. The cubic root of 4000723 is about 158.7496687120.

Adding to 4000723 its reverse (3270004), we get a palindrome (7270727).

The spelling of 4000723 in words is "four million, seven hundred twenty-three", and thus it is an aban number.