713261821 has 4 divisors (see below), whose sum is σ = 713594044. Its totient is φ = 712929600.

The previous prime is 713261819. The next prime is 713261827. The reversal of 713261821 is 128162317.

713261821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174372025 + 538889796 = 13205^2 + 23214^2 .

It is a cyclic number.

It is not a de Polignac number, because 713261821 - 2¹ = 713261819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (713261827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162870 + ... + 167191.

It is an arithmetic number, because the mean of its divisors is an integer number (178398511).

Almost surely, 2^713261821 is an apocalyptic number.

It is an amenable number.

713261821 is a deficient number, since it is larger than the sum of its proper divisors (332223).

713261821 is a wasteful number, since it uses less digits than its factorization.

713261821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332222.

The product of its digits is 4032, while the sum is 31.

The square root of 713261821 is about 26706.9620323990. The cubic root of 713261821 is about 893.4762086615.

The spelling of 713261821 in words is "seven hundred thirteen million, two hundred sixty-one thousand, eight hundred twenty-one".