3891105143 has 4 divisors (see below), whose sum is σ = 3891415080. Its totient is φ = 3890795208.

The previous prime is 3891105103. The next prime is 3891105157. The reversal of 3891105143 is 3415011983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3891105143 - 2⁶ = 3891105079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891105103) 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, 135305 + ... + 161522.

It is an arithmetic number, because the mean of its divisors is an integer number (972853770).

Almost surely, 2^3891105143 is an apocalyptic number.

3891105143 is a deficient number, since it is larger than the sum of its proper divisors (309937).

3891105143 is a wasteful number, since it uses less digits than its factorization.

3891105143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309936.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 3891105143 is about 62378.7234800457. The cubic root of 3891105143 is about 1572.8633350516.

The spelling of 3891105143 in words is "three billion, eight hundred ninety-one million, one hundred five thousand, one hundred forty-three".