675971209 has 4 divisors (see below), whose sum is σ = 676024960. Its totient is φ = 675917460.

The previous prime is 675971183. The next prime is 675971243. The reversal of 675971209 is 902179576.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 675971209 - 2⁹ = 675970697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675971299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3232 + ... + 36910.

It is an arithmetic number, because the mean of its divisors is an integer number (169006240).

Almost surely, 2^675971209 is an apocalyptic number.

It is an amenable number.

675971209 is a deficient number, since it is larger than the sum of its proper divisors (53751).

675971209 is a wasteful number, since it uses less digits than its factorization.

675971209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53750.

The product of its (nonzero) digits is 238140, while the sum is 46.

The square root of 675971209 is about 25999.4463210277. The cubic root of 675971209 is about 877.6258357484.

The spelling of 675971209 in words is "six hundred seventy-five million, nine hundred seventy-one thousand, two hundred nine".