3911491867 has 8 divisors (see below), whose sum is σ = 4250178560. Its totient is φ = 3586087080.

The previous prime is 3911491819. The next prime is 3911491873. The reversal of 3911491867 is 7681941193.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3911491867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3911491867.

It is not an unprimeable number, because it can be changed into a prime (3911491807) 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, 3319863 + ... + 3321040.

It is an arithmetic number, because the mean of its divisors is an integer number (531272320).

Almost surely, 2^3911491867 is an apocalyptic number.

3911491867 is a deficient number, since it is larger than the sum of its proper divisors (338686693).

3911491867 is a wasteful number, since it uses less digits than its factorization.

3911491867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640953.

The product of its digits is 326592, while the sum is 49.

The square root of 3911491867 is about 62541.9208771205. The cubic root of 3911491867 is about 1575.6054602741.

The spelling of 3911491867 in words is "three billion, nine hundred eleven million, four hundred ninety-one thousand, eight hundred sixty-seven".