723407 has 2 divisors, whose sum is σ = 723408. Its totient is φ = 723406.

The previous prime is 723391. The next prime is 723409. The reversal of 723407 is 704327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 723407 - 2⁴ = 723391 is a prime.

Together with 723409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723409) 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 as a sum of consecutive naturals, namely, 361703 + 361704.

It is an arithmetic number, because the mean of its divisors is an integer number (361704).

2⁷²³⁴⁰⁷ is an apocalyptic number.

723407 is a deficient number, since it is larger than the sum of its proper divisors (1).

723407 is an equidigital number, since it uses as much as digits as its factorization.

723407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 723407 is about 850.5333620735. The cubic root of 723407 is about 89.7692442498.

The spelling of 723407 in words is "seven hundred twenty-three thousand, four hundred seven", and thus it is an iban number.