82447357 has 2 divisors, whose sum is σ = 82447358. Its totient is φ = 82447356.

The previous prime is 82447333. The next prime is 82447369. The reversal of 82447357 is 75374428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77633721 + 4813636 = 8811^2 + 2194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82447357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82447307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41223678 + 41223679.

It is an arithmetic number, because the mean of its divisors is an integer number (41223679).

Almost surely, 2^82447357 is an apocalyptic number.

It is an amenable number.

82447357 is a deficient number, since it is larger than the sum of its proper divisors (1).

82447357 is an equidigital number, since it uses as much as digits as its factorization.

82447357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 40.

The square root of 82447357 is about 9080.0526980850. The cubic root of 82447357 is about 435.2367707367.

The spelling of 82447357 in words is "eighty-two million, four hundred forty-seven thousand, three hundred fifty-seven".