676159949 has 2 divisors, whose sum is σ = 676159950. Its totient is φ = 676159948.

The previous prime is 676159943. The next prime is 676159961. The reversal of 676159949 is 949951676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646074724 + 30085225 = 25418^2 + 5485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-676159949 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 676159894 and 676159903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676159943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338079974 + 338079975.

It is an arithmetic number, because the mean of its divisors is an integer number (338079975).

Almost surely, 2^676159949 is an apocalyptic number.

It is an amenable number.

676159949 is a deficient number, since it is larger than the sum of its proper divisors (1).

676159949 is an equidigital number, since it uses as much as digits as its factorization.

676159949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 56.

The square root of 676159949 is about 26003.0757603788. The cubic root of 676159949 is about 877.7075096836.

The spelling of 676159949 in words is "six hundred seventy-six million, one hundred fifty-nine thousand, nine hundred forty-nine".