82412779 has 2 divisors, whose sum is σ = 82412780. Its totient is φ = 82412778.

The previous prime is 82412777. The next prime is 82412789. The reversal of 82412779 is 97721428.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82412779 - 2¹ = 82412777 is a prime.

It is a super-2 number, since 2×82412779² = 13583732285005682, which contains 22 as substring.

Together with 82412777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82412777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41206389 + 41206390.

It is an arithmetic number, because the mean of its divisors is an integer number (41206390).

Almost surely, 2^82412779 is an apocalyptic number.

82412779 is a deficient number, since it is larger than the sum of its proper divisors (1).

82412779 is an equidigital number, since it uses as much as digits as its factorization.

82412779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 82412779 is about 9078.1484345653. The cubic root of 82412779 is about 435.1759168698.

The spelling of 82412779 in words is "eighty-two million, four hundred twelve thousand, seven hundred seventy-nine".