3143985691 has 8 divisors (see below), whose sum is σ = 3919774464. Its totient is φ = 2449858920.

The previous prime is 3143985679. The next prime is 3143985707. The reversal of 3143985691 is 1965893413.

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 3143985691 - 2⁵ = 3143985659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3143985191) 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, 20415415 + ... + 20415568.

It is an arithmetic number, because the mean of its divisors is an integer number (489971808).

Almost surely, 2^3143985691 is an apocalyptic number.

3143985691 is a deficient number, since it is larger than the sum of its proper divisors (775788773).

3143985691 is a wasteful number, since it uses less digits than its factorization.

3143985691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40831001.

The product of its digits is 699840, while the sum is 49.

The square root of 3143985691 is about 56071.2554790777. The cubic root of 3143985691 is about 1464.9636664683.

The spelling of 3143985691 in words is "three billion, one hundred forty-three million, nine hundred eighty-five thousand, six hundred ninety-one".