670892809 has 2 divisors, whose sum is σ = 670892810. Its totient is φ = 670892808.

The previous prime is 670892779. The next prime is 670892861. The reversal of 670892809 is 908298076.

It is a happy number.

670892809 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., 658076409 + 12816400 = 25653^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 670892809 - 2²³ = 662504201 is a prime.

It is a super-2 number, since 2×670892809² = 900194322335820962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (670893809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335446404 + 335446405.

It is an arithmetic number, because the mean of its divisors is an integer number (335446405).

Almost surely, 2^670892809 is an apocalyptic number.

It is an amenable number.

670892809 is a deficient number, since it is larger than the sum of its proper divisors (1).

670892809 is an equidigital number, since it uses as much as digits as its factorization.

670892809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 670892809 is about 25901.5985800105. The cubic root of 670892809 is about 875.4225155097.

The spelling of 670892809 in words is "six hundred seventy million, eight hundred ninety-two thousand, eight hundred nine".