39913031993 has 8 divisors (see below), whose sum is σ = 40038919488. Its totient is φ = 39787339984.

The previous prime is 39913031989. The next prime is 39913032023.

It is a happy number.

39913031993 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 39913031993 - 2² = 39913031989 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 (39913031293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365630 + ... + 462072.

It is an arithmetic number, because the mean of its divisors is an integer number (5004864936).

Almost surely, 2^39913031993 is an apocalyptic number.

It is an amenable number.

39913031993 is a deficient number, since it is larger than the sum of its proper divisors (125887495).

39913031993 is an equidigital number, since it uses as much as digits as its factorization.

39913031993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97743.

The product of its (nonzero) digits is 531441, while the sum is 50.

The spelling of 39913031993 in words is "thirty-nine billion, nine hundred thirteen million, thirty-one thousand, nine hundred ninety-three".