1678381513 has 2 divisors, whose sum is σ = 1678381514. Its totient is φ = 1678381512.

The previous prime is 1678381499. The next prime is 1678381589. The reversal of 1678381513 is 3151838761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1678377024 + 4489 = 40968^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 1678381513 - 2¹³ = 1678373321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1678381513.

It is not a weakly prime, because it can be changed into another prime (1678381613) 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, 839190756 + 839190757.

It is an arithmetic number, because the mean of its divisors is an integer number (839190757).

Almost surely, 2^1678381513 is an apocalyptic number.

It is an amenable number.

1678381513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678381513 is an equidigital number, since it uses as much as digits as its factorization.

1678381513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 1678381513 is about 40968.0547866261. The cubic root of 1678381513 is about 1188.4025154982.

The spelling of 1678381513 in words is "one billion, six hundred seventy-eight million, three hundred eighty-one thousand, five hundred thirteen".