78039413 has 2 divisors, whose sum is σ = 78039414. Its totient is φ = 78039412.

The previous prime is 78039407. The next prime is 78039419. The reversal of 78039413 is 31493087.

It is a balanced prime because it is at equal distance from previous prime (78039407) and next prime (78039419).

It can be written as a sum of positive squares in only one way, i.e., 72624484 + 5414929 = 8522^2 + 2327^2 .

It is a cyclic number.

It is not a de Polignac number, because 78039413 - 2⁴ = 78039397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78039419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39019706 + 39019707.

It is an arithmetic number, because the mean of its divisors is an integer number (39019707).

Almost surely, 2^78039413 is an apocalyptic number.

It is an amenable number.

78039413 is a deficient number, since it is larger than the sum of its proper divisors (1).

78039413 is an equidigital number, since it uses as much as digits as its factorization.

78039413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 78039413 is about 8833.9919062675. The cubic root of 78039413 is about 427.3378211360.

The spelling of 78039413 in words is "seventy-eight million, thirty-nine thousand, four hundred thirteen".