82665397 has 2 divisors, whose sum is σ = 82665398. Its totient is φ = 82665396.

The previous prime is 82665391. The next prime is 82665421. The reversal of 82665397 is 79356628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53494596 + 29170801 = 7314^2 + 5401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82665397 is a prime.

It is a super-2 number, since 2×82665397² = 13667135722335218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82665391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41332698 + 41332699.

It is an arithmetic number, because the mean of its divisors is an integer number (41332699).

Almost surely, 2^82665397 is an apocalyptic number.

It is an amenable number.

82665397 is a deficient number, since it is larger than the sum of its proper divisors (1).

82665397 is an equidigital number, since it uses as much as digits as its factorization.

82665397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 82665397 is about 9092.0513086982. The cubic root of 82665397 is about 435.6201082387.

The spelling of 82665397 in words is "eighty-two million, six hundred sixty-five thousand, three hundred ninety-seven".