82644277 has 2 divisors, whose sum is σ = 82644278. Its totient is φ = 82644276.

The previous prime is 82644271. The next prime is 82644311. The reversal of 82644277 is 77244628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63904036 + 18740241 = 7994^2 + 4329^2 .

It is a cyclic number.

It is not a de Polignac number, because 82644277 - 2¹⁵ = 82611509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82644271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41322138 + 41322139.

It is an arithmetic number, because the mean of its divisors is an integer number (41322139).

Almost surely, 2^82644277 is an apocalyptic number.

It is an amenable number.

82644277 is a deficient number, since it is larger than the sum of its proper divisors (1).

82644277 is an equidigital number, since it uses as much as digits as its factorization.

82644277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 40.

The square root of 82644277 is about 9090.8897804340. The cubic root of 82644277 is about 435.5830065385.

The spelling of 82644277 in words is "eighty-two million, six hundred forty-four thousand, two hundred seventy-seven".