71022009 has 8 divisors (see below), whose sum is σ = 95225760. Its totient is φ = 47083136.

The previous prime is 71022001. The next prime is 71022041. The reversal of 71022009 is 90022017.

It is a happy number.

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 71022009 - 2³ = 71022001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71022001) 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, 65592 + ... + 66665.

It is an arithmetic number, because the mean of its divisors is an integer number (11903220).

Almost surely, 2^71022009 is an apocalyptic number.

It is an amenable number.

71022009 is a deficient number, since it is larger than the sum of its proper divisors (24203751).

71022009 is a wasteful number, since it uses less digits than its factorization.

71022009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132439.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 71022009 is about 8427.4556658579. The cubic root of 71022009 is about 414.1245570280.

The spelling of 71022009 in words is "seventy-one million, twenty-two thousand, nine".