82077647 has 2 divisors, whose sum is σ = 82077648. Its totient is φ = 82077646.

The previous prime is 82077643. The next prime is 82077679. The reversal of 82077647 is 74677028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82077647 - 2² = 82077643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82077643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41038823 + 41038824.

It is an arithmetic number, because the mean of its divisors is an integer number (41038824).

Almost surely, 2^82077647 is an apocalyptic number.

82077647 is a deficient number, since it is larger than the sum of its proper divisors (1).

82077647 is an equidigital number, since it uses as much as digits as its factorization.

82077647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 82077647 is about 9059.6714620344. The cubic root of 82077647 is about 434.5852337532.

The spelling of 82077647 in words is "eighty-two million, seventy-seven thousand, six hundred forty-seven".