682713221 has 2 divisors, whose sum is σ = 682713222. Its totient is φ = 682713220.

The previous prime is 682713173. The next prime is 682713253. The reversal of 682713221 is 122317286.

It is an a-pointer prime, because the next prime (682713253) can be obtained adding 682713221 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470282596 + 212430625 = 21686^2 + 14575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-682713221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (682713271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341356610 + 341356611.

It is an arithmetic number, because the mean of its divisors is an integer number (341356611).

Almost surely, 2^682713221 is an apocalyptic number.

It is an amenable number.

682713221 is a deficient number, since it is larger than the sum of its proper divisors (1).

682713221 is an equidigital number, since it uses as much as digits as its factorization.

682713221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 682713221 is about 26128.7814679522. The cubic root of 682713221 is about 880.5339480812.

The spelling of 682713221 in words is "six hundred eighty-two million, seven hundred thirteen thousand, two hundred twenty-one".