82981771 has 2 divisors, whose sum is σ = 82981772. Its totient is φ = 82981770.

The previous prime is 82981763. The next prime is 82981781. The reversal of 82981771 is 17718928.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82981771 - 2³ = 82981763 is a prime.

It is not a weakly prime, because it can be changed into another prime (82981741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41490885 + 41490886.

It is an arithmetic number, because the mean of its divisors is an integer number (41490886).

Almost surely, 2^82981771 is an apocalyptic number.

82981771 is a deficient number, since it is larger than the sum of its proper divisors (1).

82981771 is an equidigital number, since it uses as much as digits as its factorization.

82981771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 43.

The square root of 82981771 is about 9109.4330778595. The cubic root of 82981771 is about 436.1751305960.

The spelling of 82981771 in words is "eighty-two million, nine hundred eighty-one thousand, seven hundred seventy-one".