12878377 has 2 divisors, whose sum is σ = 12878378. Its totient is φ = 12878376.

The previous prime is 12878357. The next prime is 12878431. The reversal of 12878377 is 77387821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12787776 + 90601 = 3576^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 12878377 - 2¹¹ = 12876329 is a prime.

It is not a weakly prime, because it can be changed into another prime (12878347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6439188 + 6439189.

It is an arithmetic number, because the mean of its divisors is an integer number (6439189).

Almost surely, 2^12878377 is an apocalyptic number.

It is an amenable number.

12878377 is a deficient number, since it is larger than the sum of its proper divisors (1).

12878377 is an equidigital number, since it uses as much as digits as its factorization.

12878377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 43.

The square root of 12878377 is about 3588.6455662269. The cubic root of 12878377 is about 234.3978973067.

The spelling of 12878377 in words is "twelve million, eight hundred seventy-eight thousand, three hundred seventy-seven".