677467409 has 2 divisors, whose sum is σ = 677467410. Its totient is φ = 677467408.

The previous prime is 677467361. The next prime is 677467433. The reversal of 677467409 is 904764776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546250384 + 131217025 = 23372^2 + 11455^2 .

It is a cyclic number.

It is not a de Polignac number, because 677467409 - 2¹² = 677463313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (677467489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338733704 + 338733705.

It is an arithmetic number, because the mean of its divisors is an integer number (338733705).

Almost surely, 2^677467409 is an apocalyptic number.

It is an amenable number.

677467409 is a deficient number, since it is larger than the sum of its proper divisors (1).

677467409 is an equidigital number, since it uses as much as digits as its factorization.

677467409 is an odious number, because the sum of its binary digits is odd.

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

The square root of 677467409 is about 26028.2041063151. The cubic root of 677467409 is about 878.2728732436.

It can be divided in two parts, 67746740 and 9, that multiplied together give a triangular number (609720660 = T₃₄₉₂₀).

The spelling of 677467409 in words is "six hundred seventy-seven million, four hundred sixty-seven thousand, four hundred nine".