723623 has 2 divisors, whose sum is σ = 723624. Its totient is φ = 723622.

The previous prime is 723617. The next prime is 723661. The reversal of 723623 is 326327.

723623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 723623 - 2⁴ = 723607 is a prime.

It is a super-2 number, since 2×723623² = 1047260492258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 7 + 2¹¹ + 6 + 3¹⁰ + 2¹⁷ + 3¹² .

It is equal to p₅₈₃₁₆ and since 723623 and 58316 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361811 + 361812.

It is an arithmetic number, because the mean of its divisors is an integer number (361812).

2⁷²³⁶²³ is an apocalyptic number.

723623 is a deficient number, since it is larger than the sum of its proper divisors (1).

723623 is an equidigital number, since it uses as much as digits as its factorization.

723623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 23.

The square root of 723623 is about 850.6603317423. The cubic root of 723623 is about 89.7781780068.

The spelling of 723623 in words is "seven hundred twenty-three thousand, six hundred twenty-three".