71297984033 has 4 divisors (see below), whose sum is σ = 72200490240. Its totient is φ = 70395477828.

The previous prime is 71297983973. The next prime is 71297984047. The reversal of 71297984033 is 33048979217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71297984033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71297984333) 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, 451252985 + ... + 451253142.

It is an arithmetic number, because the mean of its divisors is an integer number (18050122560).

Almost surely, 2^71297984033 is an apocalyptic number.

It is an amenable number.

71297984033 is a deficient number, since it is larger than the sum of its proper divisors (902506207).

71297984033 is an equidigital number, since it uses as much as digits as its factorization.

71297984033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902506206.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 71297984033 in words is "seventy-one billion, two hundred ninety-seven million, nine hundred eighty-four thousand, thirty-three".