82077871 has 2 divisors, whose sum is σ = 82077872. Its totient is φ = 82077870.

The previous prime is 82077851. The next prime is 82077901. The reversal of 82077871 is 17877028.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82077871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82077851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41038935 + 41038936.

It is an arithmetic number, because the mean of its divisors is an integer number (41038936).

Almost surely, 2^82077871 is an apocalyptic number.

82077871 is a deficient number, since it is larger than the sum of its proper divisors (1).

82077871 is an equidigital number, since it uses as much as digits as its factorization.

82077871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 82077871 is about 9059.6838245051. The cubic root of 82077871 is about 434.5856290984.

The spelling of 82077871 in words is "eighty-two million, seventy-seven thousand, eight hundred seventy-one".