82101797 has 2 divisors, whose sum is σ = 82101798. Its totient is φ = 82101796.

The previous prime is 82101787. The next prime is 82101829. The reversal of 82101797 is 79710128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42172036 + 39929761 = 6494^2 + 6319^2 .

It is a cyclic number.

It is not a de Polignac number, because 82101797 - 2²² = 77907493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82101707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41050898 + 41050899.

It is an arithmetic number, because the mean of its divisors is an integer number (41050899).

Almost surely, 2^82101797 is an apocalyptic number.

It is an amenable number.

82101797 is a deficient number, since it is larger than the sum of its proper divisors (1).

82101797 is an equidigital number, since it uses as much as digits as its factorization.

82101797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 82101797 is about 9061.0041937966. The cubic root of 82101797 is about 434.6278527634.

The spelling of 82101797 in words is "eighty-two million, one hundred one thousand, seven hundred ninety-seven".