12489877 has 2 divisors, whose sum is σ = 12489878. Its totient is φ = 12489876.

The previous prime is 12489863. The next prime is 12489899. The reversal of 12489877 is 77898421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 421201 = 3474^2 + 649^2 .

It is a cyclic number.

It is not a de Polignac number, because 12489877 - 2¹¹ = 12487829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12489857) 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, 6244938 + 6244939.

It is an arithmetic number, because the mean of its divisors is an integer number (6244939).

Almost surely, 2^12489877 is an apocalyptic number.

It is an amenable number.

12489877 is a deficient number, since it is larger than the sum of its proper divisors (1).

12489877 is an equidigital number, since it uses as much as digits as its factorization.

12489877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 12489877 is about 3534.1020075827. The cubic root of 12489877 is about 232.0167756894.

It can be divided in two parts, 12489 and 877, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 12489877 in words is "twelve million, four hundred eighty-nine thousand, eight hundred seventy-seven".