721363 has 2 divisors, whose sum is σ = 721364. Its totient is φ = 721362.

The previous prime is 721351. The next prime is 721379. The reversal of 721363 is 363127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 721363 - 2¹³ = 713171 is a prime.

It is equal to p₅₈₁₄₄ and since 721363 and 58144 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (721333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360681 + 360682.

It is an arithmetic number, because the mean of its divisors is an integer number (360682).

2⁷²¹³⁶³ is an apocalyptic number.

721363 is a deficient number, since it is larger than the sum of its proper divisors (1).

721363 is an equidigital number, since it uses as much as digits as its factorization.

721363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 22.

The square root of 721363 is about 849.3309131310. The cubic root of 721363 is about 89.6846162678.

The spelling of 721363 in words is "seven hundred twenty-one thousand, three hundred sixty-three".