676443181 has 2 divisors, whose sum is σ = 676443182. Its totient is φ = 676443180.

The previous prime is 676443143. The next prime is 676443197. The reversal of 676443181 is 181344676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410427081 + 266016100 = 20259^2 + 16310^2 .

It is a cyclic number.

It is not a de Polignac number, because 676443181 - 2¹¹ = 676441133 is a prime.

It is a super-2 number, since 2×676443181² = 915150754242797522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676543181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338221590 + 338221591.

It is an arithmetic number, because the mean of its divisors is an integer number (338221591).

Almost surely, 2^676443181 is an apocalyptic number.

It is an amenable number.

676443181 is a deficient number, since it is larger than the sum of its proper divisors (1).

676443181 is an equidigital number, since it uses as much as digits as its factorization.

676443181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 676443181 is about 26008.5213151382. The cubic root of 676443181 is about 877.8300448673.

The spelling of 676443181 in words is "six hundred seventy-six million, four hundred forty-three thousand, one hundred eighty-one".