721714613 has 2 divisors, whose sum is σ = 721714614. Its totient is φ = 721714612.

The previous prime is 721714603. The next prime is 721714649. The reversal of 721714613 is 316417127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396886084 + 324828529 = 19922^2 + 18023^2 .

It is a cyclic number.

It is not a de Polignac number, because 721714613 - 2¹⁸ = 721452469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 721714613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721714603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360857306 + 360857307.

It is an arithmetic number, because the mean of its divisors is an integer number (360857307).

Almost surely, 2^721714613 is an apocalyptic number.

It is an amenable number.

721714613 is a deficient number, since it is larger than the sum of its proper divisors (1).

721714613 is an equidigital number, since it uses as much as digits as its factorization.

721714613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 721714613 is about 26864.7466580275. The cubic root of 721714613 is about 896.9918551833.

The spelling of 721714613 in words is "seven hundred twenty-one million, seven hundred fourteen thousand, six hundred thirteen".