82665949 has 2 divisors, whose sum is σ = 82665950. Its totient is φ = 82665948.

The previous prime is 82665943. The next prime is 82666013. The reversal of 82665949 is 94956628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65318724 + 17347225 = 8082^2 + 4165^2 .

It is a cyclic number.

It is not a de Polignac number, because 82665949 - 2²³ = 74277341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82665943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41332974 + 41332975.

It is an arithmetic number, because the mean of its divisors is an integer number (41332975).

Almost surely, 2^82665949 is an apocalyptic number.

It is an amenable number.

82665949 is a deficient number, since it is larger than the sum of its proper divisors (1).

82665949 is an equidigital number, since it uses as much as digits as its factorization.

82665949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 82665949 is about 9092.0816648334. The cubic root of 82665949 is about 435.6210778574.

The spelling of 82665949 in words is "eighty-two million, six hundred sixty-five thousand, nine hundred forty-nine".