71268209 has 8 divisors (see below), whose sum is σ = 73586688. Its totient is φ = 68977440.

The previous prime is 71268203. The next prime is 71268217. The reversal of 71268209 is 90286217.

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 71268209 - 2⁴ = 71268193 is a prime.

It is a super-2 number, since 2×71268209² = 10158315228135362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71268203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1637 + ... + 12050.

It is an arithmetic number, because the mean of its divisors is an integer number (9198336).

Almost surely, 2^71268209 is an apocalyptic number.

It is an amenable number.

71268209 is a deficient number, since it is larger than the sum of its proper divisors (2318479).

71268209 is a wasteful number, since it uses less digits than its factorization.

71268209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13855.

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

The square root of 71268209 is about 8442.0500472338. The cubic root of 71268209 is about 414.6025303625.

It can be divided in two parts, 712 and 68209, that added together give a cube (68921 = 41³).

The spelling of 71268209 in words is "seventy-one million, two hundred sixty-eight thousand, two hundred nine".