78382689389 has 2 divisors, whose sum is σ = 78382689390. Its totient is φ = 78382689388.

The previous prime is 78382689373. The next prime is 78382689419. The reversal of 78382689389 is 98398628387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77460352489 + 922336900 = 278317^2 + 30370^2 .

It is a cyclic number.

It is not a de Polignac number, because 78382689389 - 2⁴ = 78382689373 is a prime.

It is a super-3 number, since 3×78382689389³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78382289389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39191344694 + 39191344695.

It is an arithmetic number, because the mean of its divisors is an integer number (39191344695).

Almost surely, 2^78382689389 is an apocalyptic number.

It is an amenable number.

78382689389 is a deficient number, since it is larger than the sum of its proper divisors (1).

78382689389 is an equidigital number, since it uses as much as digits as its factorization.

78382689389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250822656, while the sum is 71.

The spelling of 78382689389 in words is "seventy-eight billion, three hundred eighty-two million, six hundred eighty-nine thousand, three hundred eighty-nine".