71247906073 has 4 divisors (see below), whose sum is σ = 71314556260. Its totient is φ = 71181255888.

The previous prime is 71247906013. The next prime is 71247906077. The reversal of 71247906073 is 37060974217.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32669839504 + 38578066569 = 180748^2 + 196413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71247906073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71247906077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33323490 + ... + 33325627.

It is an arithmetic number, because the mean of its divisors is an integer number (17828639065).

Almost surely, 2^71247906073 is an apocalyptic number.

It is an amenable number.

71247906073 is a deficient number, since it is larger than the sum of its proper divisors (66650187).

71247906073 is a wasteful number, since it uses less digits than its factorization.

71247906073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66650186.

The product of its (nonzero) digits is 444528, while the sum is 46.

It can be divided in two parts, 7124 and 7906073, that added together give a palindrome (7913197).

The spelling of 71247906073 in words is "seventy-one billion, two hundred forty-seven million, nine hundred six thousand, seventy-three".