720407 has 2 divisors, whose sum is σ = 720408. Its totient is φ = 720406.

The previous prime is 720403. The next prime is 720413. The reversal of 720407 is 704027.

It is a weak prime.

It is an emirp because it is prime and its reverse (704027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720407 - 2² = 720403 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720403) 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, 360203 + 360204.

It is an arithmetic number, because the mean of its divisors is an integer number (360204).

2⁷²⁰⁴⁰⁷ is an apocalyptic number.

720407 is a deficient number, since it is larger than the sum of its proper divisors (1).

720407 is an equidigital number, since it uses as much as digits as its factorization.

720407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 720407 is about 848.7679305912. The cubic root of 720407 is about 89.6449800067.

The spelling of 720407 in words is "seven hundred twenty thousand, four hundred seven", and thus it is an iban number.