721888007 has 2 divisors, whose sum is σ = 721888008. Its totient is φ = 721888006.

The previous prime is 721888001. The next prime is 721888073. The reversal of 721888007 is 700888127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 721888007 - 2¹⁶ = 721822471 is a prime.

It is a super-2 number, since 2×721888007² = 1042244589300864098, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721888001) 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, 360944003 + 360944004.

It is an arithmetic number, because the mean of its divisors is an integer number (360944004).

Almost surely, 2^721888007 is an apocalyptic number.

721888007 is a deficient number, since it is larger than the sum of its proper divisors (1).

721888007 is an equidigital number, since it uses as much as digits as its factorization.

721888007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 721888007 is about 26867.9736303280. The cubic root of 721888007 is about 897.0636843841.

The spelling of 721888007 in words is "seven hundred twenty-one million, eight hundred eighty-eight thousand, seven".