82580947 has 2 divisors, whose sum is σ = 82580948. Its totient is φ = 82580946.

The previous prime is 82580923. The next prime is 82580963. The reversal of 82580947 is 74908528.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82580947 is a prime.

It is a super-2 number, since 2×82580947² = 13639225614833618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82580987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41290473 + 41290474.

It is an arithmetic number, because the mean of its divisors is an integer number (41290474).

Almost surely, 2^82580947 is an apocalyptic number.

82580947 is a deficient number, since it is larger than the sum of its proper divisors (1).

82580947 is an equidigital number, since it uses as much as digits as its factorization.

82580947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 82580947 is about 9087.4059554969. The cubic root of 82580947 is about 435.4717162309.

The spelling of 82580947 in words is "eighty-two million, five hundred eighty thousand, nine hundred forty-seven".