677493581 has 2 divisors, whose sum is σ = 677493582. Its totient is φ = 677493580.

The previous prime is 677493577. The next prime is 677493611. The reversal of 677493581 is 185394776.

677493581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344102500 + 333391081 = 18550^2 + 18259^2 .

It is a cyclic number.

It is not a de Polignac number, because 677493581 - 2² = 677493577 is a prime.

It is a super-2 number, since 2×677493581² = 917995104592407122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677493181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338746790 + 338746791.

It is an arithmetic number, because the mean of its divisors is an integer number (338746791).

Almost surely, 2^677493581 is an apocalyptic number.

It is an amenable number.

677493581 is a deficient number, since it is larger than the sum of its proper divisors (1).

677493581 is an equidigital number, since it uses as much as digits as its factorization.

677493581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 677493581 is about 26028.7068637687. The cubic root of 677493581 is about 878.2841829447.

The spelling of 677493581 in words is "six hundred seventy-seven million, four hundred ninety-three thousand, five hundred eighty-one".