71983340993 has 4 divisors (see below), whose sum is σ = 73203397680. Its totient is φ = 70763284308.

The previous prime is 71983340981. The next prime is 71983341037. The reversal of 71983340993 is 39904338917.

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 not a de Polignac number, because 71983340993 - 2⁴ = 71983340977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71983340893) 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, 610028255 + ... + 610028372.

It is an arithmetic number, because the mean of its divisors is an integer number (18300849420).

Almost surely, 2^71983340993 is an apocalyptic number.

It is an amenable number.

71983340993 is a deficient number, since it is larger than the sum of its proper divisors (1220056687).

71983340993 is a wasteful number, since it uses less digits than its factorization.

71983340993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220056686.

The product of its (nonzero) digits is 4408992, while the sum is 56.

The spelling of 71983340993 in words is "seventy-one billion, nine hundred eighty-three million, three hundred forty thousand, nine hundred ninety-three".