721867067 has 2 divisors, whose sum is σ = 721867068. Its totient is φ = 721867066.

The previous prime is 721867051. The next prime is 721867103. The reversal of 721867067 is 760768127.

721867067 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 721867067 - 2⁴ = 721867051 is a prime.

It is not a weakly prime, because it can be changed into another prime (721867007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360933533 + 360933534.

It is an arithmetic number, because the mean of its divisors is an integer number (360933534).

Almost surely, 2^721867067 is an apocalyptic number.

721867067 is a deficient number, since it is larger than the sum of its proper divisors (1).

721867067 is an equidigital number, since it uses as much as digits as its factorization.

721867067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 721867067 is about 26867.5839442254. The cubic root of 721867067 is about 897.0550105109.

The spelling of 721867067 in words is "seven hundred twenty-one million, eight hundred sixty-seven thousand, sixty-seven".