82071487 has 2 divisors, whose sum is σ = 82071488. Its totient is φ = 82071486.

The previous prime is 82071481. The next prime is 82071523. The reversal of 82071487 is 78417028.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82071487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82071481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41035743 + 41035744.

It is an arithmetic number, because the mean of its divisors is an integer number (41035744).

Almost surely, 2^82071487 is an apocalyptic number.

82071487 is a deficient number, since it is larger than the sum of its proper divisors (1).

82071487 is an equidigital number, since it uses as much as digits as its factorization.

82071487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 82071487 is about 9059.3314874774. The cubic root of 82071487 is about 434.5743614791.

The spelling of 82071487 in words is "eighty-two million, seventy-one thousand, four hundred eighty-seven".