78682673 has 2 divisors, whose sum is σ = 78682674. Its totient is φ = 78682672.

The previous prime is 78682663. The next prime is 78682679. The reversal of 78682673 is 37628687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42406144 + 36276529 = 6512^2 + 6023^2 .

It is an emirp because it is prime and its reverse (37628687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78682673 - 2¹² = 78678577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78682679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39341336 + 39341337.

It is an arithmetic number, because the mean of its divisors is an integer number (39341337).

Almost surely, 2^78682673 is an apocalyptic number.

It is an amenable number.

78682673 is a deficient number, since it is larger than the sum of its proper divisors (1).

78682673 is an equidigital number, since it uses as much as digits as its factorization.

78682673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 78682673 is about 8870.3254168041. The cubic root of 78682673 is about 428.5087571797.

The spelling of 78682673 in words is "seventy-eight million, six hundred eighty-two thousand, six hundred seventy-three".