12649277 has 2 divisors, whose sum is σ = 12649278. Its totient is φ = 12649276.

The previous prime is 12649261. The next prime is 12649291. The reversal of 12649277 is 77294621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10982596 + 1666681 = 3314^2 + 1291^2 .

It is an emirp because it is prime and its reverse (77294621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12649277 - 2⁴ = 12649261 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12649277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12649237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324638 + 6324639.

It is an arithmetic number, because the mean of its divisors is an integer number (6324639).

Almost surely, 2^12649277 is an apocalyptic number.

It is an amenable number.

12649277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649277 is an equidigital number, since it uses as much as digits as its factorization.

12649277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 12649277 is about 3556.5822076820. The cubic root of 12649277 is about 232.9996316007. Note that the first 3 decimals are identical.

The spelling of 12649277 in words is "twelve million, six hundred forty-nine thousand, two hundred seventy-seven".