12978773 has 2 divisors, whose sum is σ = 12978774. Its totient is φ = 12978772.

The previous prime is 12978737. The next prime is 12978809. The reversal of 12978773 is 37787921.

Together with previous prime (12978737) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (12978737) and next prime (12978809).

It can be written as a sum of positive squares in only one way, i.e., 8282884 + 4695889 = 2878^2 + 2167^2 .

It is a cyclic number.

It is not a de Polignac number, because 12978773 - 2⁶ = 12978709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12978073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6489386 + 6489387.

It is an arithmetic number, because the mean of its divisors is an integer number (6489387).

Almost surely, 2^12978773 is an apocalyptic number.

It is an amenable number.

12978773 is a deficient number, since it is larger than the sum of its proper divisors (1).

12978773 is an equidigital number, since it uses as much as digits as its factorization.

12978773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 44.

The square root of 12978773 is about 3602.6064175816. The cubic root of 12978773 is about 235.0054201255.

The spelling of 12978773 in words is "twelve million, nine hundred seventy-eight thousand, seven hundred seventy-three".