12978073 has 2 divisors, whose sum is σ = 12978074. Its totient is φ = 12978072.

The previous prime is 12978067. The next prime is 12978079. The reversal of 12978073 is 37087921.

It is a balanced prime because it is at equal distance from previous prime (12978067) and next prime (12978079).

It can be written as a sum of positive squares in only one way, i.e., 12873744 + 104329 = 3588^2 + 323^2 .

It is a cyclic number.

It is not a de Polignac number, because 12978073 - 2¹⁷ = 12847001 is a prime.

It is equal to p₈₄₇₉₀₉ and since 12978073 and 847909 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12978079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6489036 + 6489037.

It is an arithmetic number, because the mean of its divisors is an integer number (6489037).

Almost surely, 2^12978073 is an apocalyptic number.

It is an amenable number.

12978073 is a deficient number, since it is larger than the sum of its proper divisors (1).

12978073 is an equidigital number, since it uses as much as digits as its factorization.

12978073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 12978073 is about 3602.5092643878. The cubic root of 12978073 is about 235.0011951048.

The spelling of 12978073 in words is "twelve million, nine hundred seventy-eight thousand, seventy-three".