677343643 has 2 divisors, whose sum is σ = 677343644. Its totient is φ = 677343642.

The previous prime is 677343637. The next prime is 677343647. The reversal of 677343643 is 346343776.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677343643 is a prime.

It is a super-2 number, since 2×677343643² = 917588821425022898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 677343643.

It is not a weakly prime, because it can be changed into another prime (677343647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338671821 + 338671822.

It is an arithmetic number, because the mean of its divisors is an integer number (338671822).

Almost surely, 2^677343643 is an apocalyptic number.

677343643 is a deficient number, since it is larger than the sum of its proper divisors (1).

677343643 is an equidigital number, since it uses as much as digits as its factorization.

677343643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 43.

The square root of 677343643 is about 26025.8264614210. The cubic root of 677343643 is about 878.2193863210.

The spelling of 677343643 in words is "six hundred seventy-seven million, three hundred forty-three thousand, six hundred forty-three".