721327 has 8 divisors (see below), whose sum is σ = 771552. Its totient is φ = 672000.

The previous prime is 721321. The next prime is 721333. The reversal of 721327 is 723127.

721327 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (721321) and next prime (721333).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721327 - 2³ = 721319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721298 and 721307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2427 + ... + 2707.

It is an arithmetic number, because the mean of its divisors is an integer number (96444).

2⁷²¹³²⁷ is an apocalyptic number.

721327 is a deficient number, since it is larger than the sum of its proper divisors (50225).

721327 is a wasteful number, since it uses less digits than its factorization.

721327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its digits is 588, while the sum is 22.

The square root of 721327 is about 849.3097197136. The cubic root of 721327 is about 89.6831243237.

The spelling of 721327 in words is "seven hundred twenty-one thousand, three hundred twenty-seven", and thus it is an iban number.