71471009 has 8 divisors (see below), whose sum is σ = 76062888. Its totient is φ = 66922240.

The previous prime is 71470999. The next prime is 71471017. The reversal of 71471009 is 90017417.

It can be written as a sum of positive squares in 4 ways, for example, as 63043600 + 8427409 = 7940^2 + 2903^2 .

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 71471009 - 2¹⁶ = 71405473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71471069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7322 + ... + 14019.

It is an arithmetic number, because the mean of its divisors is an integer number (9507861).

Almost surely, 2^71471009 is an apocalyptic number.

It is an amenable number.

71471009 is a deficient number, since it is larger than the sum of its proper divisors (4591879).

71471009 is a wasteful number, since it uses less digits than its factorization.

71471009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21555.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 71471009 is about 8454.0528150704. The cubic root of 71471009 is about 414.9954206685.

The spelling of 71471009 in words is "seventy-one million, four hundred seventy-one thousand, nine".