712776209 has 2 divisors, whose sum is σ = 712776210. Its totient is φ = 712776208.

The previous prime is 712776199. The next prime is 712776223. The reversal of 712776209 is 902677217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 711395584 + 1380625 = 26672^2 + 1175^2 .

It is a cyclic number.

It is not a de Polignac number, because 712776209 - 2⁸ = 712775953 is a prime.

It is not a weakly prime, because it can be changed into another prime (712776269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356388104 + 356388105.

It is an arithmetic number, because the mean of its divisors is an integer number (356388105).

Almost surely, 2^712776209 is an apocalyptic number.

It is an amenable number.

712776209 is a deficient number, since it is larger than the sum of its proper divisors (1).

712776209 is an equidigital number, since it uses as much as digits as its factorization.

712776209 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 41.

The square root of 712776209 is about 26697.8689973563. The cubic root of 712776209 is about 893.2733933416.

The spelling of 712776209 in words is "seven hundred twelve million, seven hundred seventy-six thousand, two hundred nine".