722087213 has 2 divisors, whose sum is σ = 722087214. Its totient is φ = 722087212.

The previous prime is 722087209. The next prime is 722087237. The reversal of 722087213 is 312780227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 718079209 + 4008004 = 26797^2 + 2002^2 .

It is an emirp because it is prime and its reverse (312780227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722087213 - 2² = 722087209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 722087213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722087243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361043606 + 361043607.

It is an arithmetic number, because the mean of its divisors is an integer number (361043607).

Almost surely, 2^722087213 is an apocalyptic number.

It is an amenable number.

722087213 is a deficient number, since it is larger than the sum of its proper divisors (1).

722087213 is an equidigital number, since it uses as much as digits as its factorization.

722087213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 722087213 is about 26871.6805019708. The cubic root of 722087213 is about 897.1461921192.

The spelling of 722087213 in words is "seven hundred twenty-two million, eighty-seven thousand, two hundred thirteen".