82163987 has 2 divisors, whose sum is σ = 82163988. Its totient is φ = 82163986.

The previous prime is 82163957. The next prime is 82164007. The reversal of 82163987 is 78936128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82163987 - 2¹⁶ = 82098451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82163957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41081993 + 41081994.

It is an arithmetic number, because the mean of its divisors is an integer number (41081994).

Almost surely, 2^82163987 is an apocalyptic number.

82163987 is a deficient number, since it is larger than the sum of its proper divisors (1).

82163987 is an equidigital number, since it uses as much as digits as its factorization.

82163987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 82163987 is about 9064.4352830168. The cubic root of 82163987 is about 434.7375648740.

The spelling of 82163987 in words is "eighty-two million, one hundred sixty-three thousand, nine hundred eighty-seven".