71308345 has 8 divisors (see below), whose sum is σ = 86355720. Its totient is φ = 56522880.

The previous prime is 71308343. The next prime is 71308379. The reversal of 71308345 is 54380317.

It can be written as a sum of positive squares in 4 ways, for example, as 1201216 + 70107129 = 1096^2 + 8373^2 .

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

It is not a de Polignac number, because 71308345 - 2¹ = 71308343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71308343) 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, 64876 + ... + 65965.

It is an arithmetic number, because the mean of its divisors is an integer number (10794465).

Almost surely, 2^71308345 is an apocalyptic number.

It is an amenable number.

71308345 is a deficient number, since it is larger than the sum of its proper divisors (15047375).

71308345 is a wasteful number, since it uses less digits than its factorization.

71308345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130955.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 71308345 is about 8444.4268603618. The cubic root of 71308345 is about 414.6803460982.

The spelling of 71308345 in words is "seventy-one million, three hundred eight thousand, three hundred forty-five".