3991211013 has 8 divisors (see below), whose sum is σ = 5344455168. Its totient is φ = 2649387104.

The previous prime is 3991211009. The next prime is 3991211047. The reversal of 3991211013 is 3101121993.

It is a happy number.

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 3991211013 - 2² = 3991211009 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991211513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2854245 + ... + 2855642.

It is an arithmetic number, because the mean of its divisors is an integer number (668056896).

Almost surely, 2^3991211013 is an apocalyptic number.

It is an amenable number.

3991211013 is a deficient number, since it is larger than the sum of its proper divisors (1353244155).

3991211013 is a wasteful number, since it uses less digits than its factorization.

3991211013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710123.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 3991211013 is about 63176.0319504161. The cubic root of 3991211013 is about 1586.2375621261.

The spelling of 3991211013 in words is "three billion, nine hundred ninety-one million, two hundred eleven thousand, thirteen".