677074649 has 2 divisors, whose sum is σ = 677074650. Its totient is φ = 677074648.

The previous prime is 677074631. The next prime is 677074669. The reversal of 677074649 is 946470776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601819024 + 75255625 = 24532^2 + 8675^2 .

It is a cyclic number.

It is not a de Polignac number, because 677074649 - 2²⁰ = 676026073 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 677074597 and 677074606.

It is not a weakly prime, because it can be changed into another prime (677074669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338537324 + 338537325.

It is an arithmetic number, because the mean of its divisors is an integer number (338537325).

Almost surely, 2^677074649 is an apocalyptic number.

It is an amenable number.

677074649 is a deficient number, since it is larger than the sum of its proper divisors (1).

677074649 is an equidigital number, since it uses as much as digits as its factorization.

677074649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 50.

The square root of 677074649 is about 26020.6581200399. The cubic root of 677074649 is about 878.1031149487.

The spelling of 677074649 in words is "six hundred seventy-seven million, seventy-four thousand, six hundred forty-nine".