71676809 has 8 divisors (see below), whose sum is σ = 74934720. Its totient is φ = 68430736.

The previous prime is 71676793. The next prime is 71676821. The reversal of 71676809 is 90867617.

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 71676809 - 2⁴ = 71676793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71676809.

It is not an unprimeable number, because it can be changed into a prime (71676109) 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, 10847 + ... + 16155.

It is an arithmetic number, because the mean of its divisors is an integer number (9366840).

Almost surely, 2^71676809 is an apocalyptic number.

It is an amenable number.

71676809 is a deficient number, since it is larger than the sum of its proper divisors (3257911).

71676809 is a wasteful number, since it uses less digits than its factorization.

71676809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 71676809 is about 8466.2157425853. The cubic root of 71676809 is about 415.3933639016.

The spelling of 71676809 in words is "seventy-one million, six hundred seventy-six thousand, eight hundred nine".