671707009 has 8 divisors (see below), whose sum is σ = 713737440. Its totient is φ = 629956416.

The previous prime is 671706983. The next prime is 671707013. The reversal of 671707009 is 900707176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671707009 - 2¹¹ = 671704961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671704009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64999 + ... + 74620.

It is an arithmetic number, because the mean of its divisors is an integer number (89217180).

Almost surely, 2^671707009 is an apocalyptic number.

It is an amenable number.

671707009 is a deficient number, since it is larger than the sum of its proper divisors (42030431).

671707009 is a wasteful number, since it uses less digits than its factorization.

671707009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139919.

The product of its (nonzero) digits is 18522, while the sum is 37.

The square root of 671707009 is about 25917.3109909188. The cubic root of 671707009 is about 875.7765118841.

The spelling of 671707009 in words is "six hundred seventy-one million, seven hundred seven thousand, nine".