71064309 has 8 divisors (see below), whose sum is σ = 97313440. Its totient is φ = 46095696.

The previous prime is 71064299. The next prime is 71064311. The reversal of 71064309 is 90346017.

It is a happy number.

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

It is not a de Polignac number, because 71064309 - 2⁵ = 71064277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71064359) 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, 319999 + ... + 320220.

It is an arithmetic number, because the mean of its divisors is an integer number (12164180).

Almost surely, 2^71064309 is an apocalyptic number.

It is an amenable number.

71064309 is a deficient number, since it is larger than the sum of its proper divisors (26249131).

71064309 is a wasteful number, since it uses less digits than its factorization.

71064309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640259.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 71064309 is about 8429.9649465463. The cubic root of 71064309 is about 414.2067568626.

The spelling of 71064309 in words is "seventy-one million, sixty-four thousand, three hundred nine".