78563351 has 2 divisors, whose sum is σ = 78563352. Its totient is φ = 78563350.

The previous prime is 78563311. The next prime is 78563369. The reversal of 78563351 is 15336587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78563351 - 2²² = 74369047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78563311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39281675 + 39281676.

It is an arithmetic number, because the mean of its divisors is an integer number (39281676).

Almost surely, 2^78563351 is an apocalyptic number.

78563351 is a deficient number, since it is larger than the sum of its proper divisors (1).

78563351 is an equidigital number, since it uses as much as digits as its factorization.

78563351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 78563351 is about 8863.5969560896. The cubic root of 78563351 is about 428.2920369109.

The spelling of 78563351 in words is "seventy-eight million, five hundred sixty-three thousand, three hundred fifty-one".