677494228349 has 2 divisors, whose sum is σ = 677494228350. Its totient is φ = 677494228348.

The previous prime is 677494228343. The next prime is 677494228379. The reversal of 677494228349 is 943822494776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661082824900 + 16411403449 = 813070^2 + 128107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677494228349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677494228343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338747114174 + 338747114175.

It is an arithmetic number, because the mean of its divisors is an integer number (338747114175).

Almost surely, 2^677494228349 is an apocalyptic number.

It is an amenable number.

677494228349 is a deficient number, since it is larger than the sum of its proper divisors (1).

677494228349 is an equidigital number, since it uses as much as digits as its factorization.

677494228349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 146313216, while the sum is 65.

The spelling of 677494228349 in words is "six hundred seventy-seven billion, four hundred ninety-four million, two hundred twenty-eight thousand, three hundred forty-nine".