670433609 has 2 divisors, whose sum is σ = 670433610. Its totient is φ = 670433608.

The previous prime is 670433531. The next prime is 670433627. The reversal of 670433609 is 906334076.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414529600 + 255904009 = 20360^2 + 15997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670433609 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (670433909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335216804 + 335216805.

It is an arithmetic number, because the mean of its divisors is an integer number (335216805).

Almost surely, 2^670433609 is an apocalyptic number.

It is an amenable number.

670433609 is a deficient number, since it is larger than the sum of its proper divisors (1).

670433609 is an equidigital number, since it uses as much as digits as its factorization.

670433609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 670433609 is about 25892.7327449229. The cubic root of 670433609 is about 875.2227390501. Note that the first 3 decimals are identical.

The spelling of 670433609 in words is "six hundred seventy million, four hundred thirty-three thousand, six hundred nine".