82715197 has 2 divisors, whose sum is σ = 82715198. Its totient is φ = 82715196.

The previous prime is 82715177. The next prime is 82715201. The reversal of 82715197 is 79151728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67551961 + 15163236 = 8219^2 + 3894^2 .

It is a cyclic number.

It is not a de Polignac number, because 82715197 - 2¹¹ = 82713149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82715117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41357598 + 41357599.

It is an arithmetic number, because the mean of its divisors is an integer number (41357599).

Almost surely, 2^82715197 is an apocalyptic number.

It is an amenable number.

82715197 is a deficient number, since it is larger than the sum of its proper divisors (1).

82715197 is an equidigital number, since it uses as much as digits as its factorization.

82715197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 40.

The square root of 82715197 is about 9094.7895522656. The cubic root of 82715197 is about 435.7075673501.

The spelling of 82715197 in words is "eighty-two million, seven hundred fifteen thousand, one hundred ninety-seven".