677169949 has 2 divisors, whose sum is σ = 677169950. Its totient is φ = 677169948.

The previous prime is 677169947. The next prime is 677170019. The reversal of 677169949 is 949961776.

677169949 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., 411805849 + 265364100 = 20293^2 + 16290^2 .

It is a cyclic number.

It is not a de Polignac number, because 677169949 - 2¹ = 677169947 is a prime.

Together with 677169947, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 677169893 and 677169902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677169943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338584974 + 338584975.

It is an arithmetic number, because the mean of its divisors is an integer number (338584975).

Almost surely, 2^677169949 is an apocalyptic number.

It is an amenable number.

677169949 is a deficient number, since it is larger than the sum of its proper divisors (1).

677169949 is an equidigital number, since it uses as much as digits as its factorization.

677169949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 58.

The square root of 677169949 is about 26022.4892929174. The cubic root of 677169949 is about 878.1443114407.

The spelling of 677169949 in words is "six hundred seventy-seven million, one hundred sixty-nine thousand, nine hundred forty-nine".