8321719277 has 2 divisors, whose sum is σ = 8321719278. Its totient is φ = 8321719276.

The previous prime is 8321719271. The next prime is 8321719291. The reversal of 8321719277 is 7729171238.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5856993961 + 2464725316 = 76531^2 + 49646^2 .

It is a cyclic number.

It is not a de Polignac number, because 8321719277 - 2⁴ = 8321719261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8321719271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4160859638 + 4160859639.

It is an arithmetic number, because the mean of its divisors is an integer number (4160859639).

Almost surely, 2^8321719277 is an apocalyptic number.

It is an amenable number.

8321719277 is a deficient number, since it is larger than the sum of its proper divisors (1).

8321719277 is an equidigital number, since it uses as much as digits as its factorization.

8321719277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 8321719277 is about 91223.4579316088. The cubic root of 8321719277 is about 2026.4583734809.

The spelling of 8321719277 in words is "eight billion, three hundred twenty-one million, seven hundred nineteen thousand, two hundred seventy-seven".