39911211993 has 4 divisors (see below), whose sum is σ = 53214949328. Its totient is φ = 26607474660.

The previous prime is 39911211983. The next prime is 39911212027.

39911211993 is nontrivially palindromic in base 10.

39911211993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 39911211993 - 2⁶ = 39911211929 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 (39911211953) 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, 6651868663 + ... + 6651868668.

It is an arithmetic number, because the mean of its divisors is an integer number (13303737332).

Almost surely, 2^39911211993 is an apocalyptic number.

It is an amenable number.

39911211993 is a deficient number, since it is larger than the sum of its proper divisors (13303737335).

39911211993 is a wasteful number, since it uses less digits than its factorization.

39911211993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13303737334.

The product of its digits is 118098, while the sum is 48.

The spelling of 39911211993 in words is "thirty-nine billion, nine hundred eleven million, two hundred eleven thousand, nine hundred ninety-three".