6872763221 has 2 divisors, whose sum is σ = 6872763222. Its totient is φ = 6872763220.

The previous prime is 6872763199. The next prime is 6872763223. The reversal of 6872763221 is 1223672786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5988592996 + 884170225 = 77386^2 + 29735^2 .

It is a cyclic number.

It is not a de Polignac number, because 6872763221 - 2²⁶ = 6805654357 is a prime.

Together with 6872763223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6872763223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3436381610 + 3436381611.

It is an arithmetic number, because the mean of its divisors is an integer number (3436381611).

Almost surely, 2^6872763221 is an apocalyptic number.

It is an amenable number.

6872763221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6872763221 is an equidigital number, since it uses as much as digits as its factorization.

6872763221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The square root of 6872763221 is about 82902.1303767280. The cubic root of 6872763221 is about 1901.2699931229.

The spelling of 6872763221 in words is "six billion, eight hundred seventy-two million, seven hundred sixty-three thousand, two hundred twenty-one".