721754713 has 2 divisors, whose sum is σ = 721754714. Its totient is φ = 721754712.

The previous prime is 721754647. The next prime is 721754717. The reversal of 721754713 is 317457127.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469675584 + 252079129 = 21672^2 + 15877^2 .

It is a cyclic number.

It is not a de Polignac number, because 721754713 - 2²⁵ = 688200281 is a prime.

It is not a weakly prime, because it can be changed into another prime (721754717) 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, 360877356 + 360877357.

It is an arithmetic number, because the mean of its divisors is an integer number (360877357).

Almost surely, 2^721754713 is an apocalyptic number.

It is an amenable number.

721754713 is a deficient number, since it is larger than the sum of its proper divisors (1).

721754713 is an equidigital number, since it uses as much as digits as its factorization.

721754713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 37.

The square root of 721754713 is about 26865.4929789126. The cubic root of 721754713 is about 897.0084678011.

The spelling of 721754713 in words is "seven hundred twenty-one million, seven hundred fifty-four thousand, seven hundred thirteen".