78908413 has 2 divisors, whose sum is σ = 78908414. Its totient is φ = 78908412.

The previous prime is 78908411. The next prime is 78908419. The reversal of 78908413 is 31480987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49942489 + 28965924 = 7067^2 + 5382^2 .

It is a cyclic number.

It is not a de Polignac number, because 78908413 - 2¹ = 78908411 is a prime.

Together with 78908411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78908411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39454206 + 39454207.

It is an arithmetic number, because the mean of its divisors is an integer number (39454207).

Almost surely, 2^78908413 is an apocalyptic number.

It is an amenable number.

78908413 is a deficient number, since it is larger than the sum of its proper divisors (1).

78908413 is an equidigital number, since it uses as much as digits as its factorization.

78908413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 78908413 is about 8883.0407519047. The cubic root of 78908413 is about 428.9181620417.

The spelling of 78908413 in words is "seventy-eight million, nine hundred eight thousand, four hundred thirteen".