82588981 has 2 divisors, whose sum is σ = 82588982. Its totient is φ = 82588980.

The previous prime is 82588963. The next prime is 82588993. The reversal of 82588981 is 18988528.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70408881 + 12180100 = 8391^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 82588981 - 2¹³ = 82580789 is a prime.

It is a super-2 number, since 2×82588981² = 13641879565236722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82588951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41294490 + 41294491.

It is an arithmetic number, because the mean of its divisors is an integer number (41294491).

Almost surely, 2^82588981 is an apocalyptic number.

It is an amenable number.

82588981 is a deficient number, since it is larger than the sum of its proper divisors (1).

82588981 is an equidigital number, since it uses as much as digits as its factorization.

82588981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 49.

The square root of 82588981 is about 9087.8479850843. The cubic root of 82588981 is about 435.4858375928.

The spelling of 82588981 in words is "eighty-two million, five hundred eighty-eight thousand, nine hundred eighty-one".