78063149 has 2 divisors, whose sum is σ = 78063150. Its totient is φ = 78063148.

The previous prime is 78063137. The next prime is 78063169. The reversal of 78063149 is 94136087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77968900 + 94249 = 8830^2 + 307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78063149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78063119) 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, 39031574 + 39031575.

It is an arithmetic number, because the mean of its divisors is an integer number (39031575).

Almost surely, 2^78063149 is an apocalyptic number.

It is an amenable number.

78063149 is a deficient number, since it is larger than the sum of its proper divisors (1).

78063149 is an equidigital number, since it uses as much as digits as its factorization.

78063149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 78063149 is about 8835.3352511379. The cubic root of 78063149 is about 427.3811422475.

The spelling of 78063149 in words is "seventy-eight million, sixty-three thousand, one hundred forty-nine".