82578647 has 2 divisors, whose sum is σ = 82578648. Its totient is φ = 82578646.

The previous prime is 82578623. The next prime is 82578653. The reversal of 82578647 is 74687528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82578647 - 2¹⁶ = 82513111 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82578667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41289323 + 41289324.

It is an arithmetic number, because the mean of its divisors is an integer number (41289324).

Almost surely, 2^82578647 is an apocalyptic number.

82578647 is a deficient number, since it is larger than the sum of its proper divisors (1).

82578647 is an equidigital number, since it uses as much as digits as its factorization.

82578647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 47.

The square root of 82578647 is about 9087.2794058508. The cubic root of 82578647 is about 435.4676733523.

The spelling of 82578647 in words is "eighty-two million, five hundred seventy-eight thousand, six hundred forty-seven".