12761689 has 2 divisors, whose sum is σ = 12761690. Its totient is φ = 12761688.

The previous prime is 12761681. The next prime is 12761719. The reversal of 12761689 is 98616721.

12761689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12306064 + 455625 = 3508^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 12761689 - 2³ = 12761681 is a prime.

It is a super-2 number, since 2×12761689² = 325721412265442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12761681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6380844 + 6380845.

It is an arithmetic number, because the mean of its divisors is an integer number (6380845).

Almost surely, 2^12761689 is an apocalyptic number.

It is an amenable number.

12761689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12761689 is an equidigital number, since it uses as much as digits as its factorization.

12761689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 12761689 is about 3572.3506266883. The cubic root of 12761689 is about 233.6878065733.

It can be divided in two parts, 127 and 61689, that added together give a palindrome (61816).

The spelling of 12761689 in words is "twelve million, seven hundred sixty-one thousand, six hundred eighty-nine".