676443197 has 2 divisors, whose sum is σ = 676443198. Its totient is φ = 676443196.

The previous prime is 676443181. The next prime is 676443203. The reversal of 676443197 is 791344676.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 675688036 + 755161 = 25994^2 + 869^2 .

It is a cyclic number.

It is not a de Polignac number, because 676443197 - 2⁴ = 676443181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676443697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338221598 + 338221599.

It is an arithmetic number, because the mean of its divisors is an integer number (338221599).

Almost surely, 2^676443197 is an apocalyptic number.

It is an amenable number.

676443197 is a deficient number, since it is larger than the sum of its proper divisors (1).

676443197 is an equidigital number, since it uses as much as digits as its factorization.

676443197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

The square root of 676443197 is about 26008.5216227297. The cubic root of 676443197 is about 877.8300517885.

The spelling of 676443197 in words is "six hundred seventy-six million, four hundred forty-three thousand, one hundred ninety-seven".