277734472949 has 2 divisors, whose sum is σ = 277734472950. Its totient is φ = 277734472948.

The previous prime is 277734472937. The next prime is 277734472973. The reversal of 277734472949 is 949274437772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187019056849 + 90715416100 = 432457^2 + 301190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-277734472949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (277734472909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138867236474 + 138867236475.

It is an arithmetic number, because the mean of its divisors is an integer number (138867236475).

Almost surely, 2^277734472949 is an apocalyptic number.

It is an amenable number.

277734472949 is a deficient number, since it is larger than the sum of its proper divisors (1).

277734472949 is an equidigital number, since it uses as much as digits as its factorization.

277734472949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149361408, while the sum is 65.

The spelling of 277734472949 in words is "two hundred seventy-seven billion, seven hundred thirty-four million, four hundred seventy-two thousand, nine hundred forty-nine".