82278071 has 2 divisors, whose sum is σ = 82278072. Its totient is φ = 82278070.

The previous prime is 82278067. The next prime is 82278073. The reversal of 82278071 is 17087228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82278071 - 2² = 82278067 is a prime.

It is a Sophie Germain prime.

Together with 82278073, 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 (82278073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41139035 + 41139036.

It is an arithmetic number, because the mean of its divisors is an integer number (41139036).

Almost surely, 2^82278071 is an apocalyptic number.

82278071 is a deficient number, since it is larger than the sum of its proper divisors (1).

82278071 is an equidigital number, since it uses as much as digits as its factorization.

82278071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 82278071 is about 9070.7260459128. The cubic root of 82278071 is about 434.9386816286.

The spelling of 82278071 in words is "eighty-two million, two hundred seventy-eight thousand, seventy-one".