12771949 has 2 divisors, whose sum is σ = 12771950. Its totient is φ = 12771948.

The previous prime is 12771943. The next prime is 12771953. The reversal of 12771949 is 94917721.

12771949 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 1334025 = 3382^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 12771949 - 2⁷ = 12771821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12771943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6385974 + 6385975.

It is an arithmetic number, because the mean of its divisors is an integer number (6385975).

Almost surely, 2^12771949 is an apocalyptic number.

It is an amenable number.

12771949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12771949 is an equidigital number, since it uses as much as digits as its factorization.

12771949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 40.

The square root of 12771949 is about 3573.7863674260. The cubic root of 12771949 is about 233.7504157008.

The spelling of 12771949 in words is "twelve million, seven hundred seventy-one thousand, nine hundred forty-nine".