677740009 has 2 divisors, whose sum is σ = 677740010. Its totient is φ = 677740008.

The previous prime is 677739971. The next prime is 677740079. The reversal of 677740009 is 900047776.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607129600 + 70610409 = 24640^2 + 8403^2 .

It is a cyclic number.

It is not a de Polignac number, because 677740009 - 2⁹ = 677739497 is a prime.

It is not a weakly prime, because it can be changed into another prime (677740079) 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, 338870004 + 338870005.

It is an arithmetic number, because the mean of its divisors is an integer number (338870005).

Almost surely, 2^677740009 is an apocalyptic number.

It is an amenable number.

677740009 is a deficient number, since it is larger than the sum of its proper divisors (1).

677740009 is an equidigital number, since it uses as much as digits as its factorization.

677740009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 677740009 is about 26033.4402067802. The cubic root of 677740009 is about 878.3906575468.

The spelling of 677740009 in words is "six hundred seventy-seven million, seven hundred forty thousand, nine".