71864009 has 8 divisors (see below), whose sum is σ = 83170560. Its totient is φ = 60817536.

The previous prime is 71864003. The next prime is 71864017. The reversal of 71864009 is 90046817.

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 71864009 - 2⁴ = 71863993 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 71864009.

It is not an unprimeable number, because it can be changed into a prime (71864003) 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, 64424 + ... + 65529.

It is an arithmetic number, because the mean of its divisors is an integer number (10396320).

Almost surely, 2^71864009 is an apocalyptic number.

71864009 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

71864009 is a deficient number, since it is larger than the sum of its proper divisors (11306551).

71864009 is a wasteful number, since it uses less digits than its factorization.

71864009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130039.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 71864009 is about 8477.2642403077. The cubic root of 71864009 is about 415.7546803886.

The spelling of 71864009 in words is "seventy-one million, eight hundred sixty-four thousand, nine".