676445381 has 2 divisors, whose sum is σ = 676445382. Its totient is φ = 676445380.

The previous prime is 676445369. The next prime is 676445437. The reversal of 676445381 is 183544676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361950625 + 314494756 = 19025^2 + 17734^2 .

It is a cyclic number.

It is not a de Polignac number, because 676445381 - 2¹⁰ = 676444357 is a prime.

It is a super-2 number, since 2×676445381² = 915156706952470322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676445281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338222690 + 338222691.

It is an arithmetic number, because the mean of its divisors is an integer number (338222691).

Almost surely, 2^676445381 is an apocalyptic number.

It is an amenable number.

676445381 is a deficient number, since it is larger than the sum of its proper divisors (1).

676445381 is an equidigital number, since it uses as much as digits as its factorization.

676445381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 676445381 is about 26008.5636089347. The cubic root of 676445381 is about 877.8309965235.

The spelling of 676445381 in words is "six hundred seventy-six million, four hundred forty-five thousand, three hundred eighty-one".