71308643 has 8 divisors (see below), whose sum is σ = 81609312. Its totient is φ = 61036416.

The previous prime is 71308619. The next prime is 71308661. The reversal of 71308643 is 34680317.

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

It is not a de Polignac number, because 71308643 - 2¹⁰ = 71307619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71308603) 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, 1430 + ... + 12027.

It is an arithmetic number, because the mean of its divisors is an integer number (10201164).

Almost surely, 2^71308643 is an apocalyptic number.

71308643 is a deficient number, since it is larger than the sum of its proper divisors (10300669).

71308643 is a wasteful number, since it uses less digits than its factorization.

71308643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14221.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 71308643 is about 8444.4445051170. Note that the first 3 decimals coincide. The cubic root of 71308643 is about 414.6809237518.

The spelling of 71308643 in words is "seventy-one million, three hundred eight thousand, six hundred forty-three".