3891143101 has 4 divisors (see below), whose sum is σ = 3934863900. Its totient is φ = 3847422304.

The previous prime is 3891143051. The next prime is 3891143111. The reversal of 3891143101 is 1013411983.

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

It can be written as a sum of positive squares in 2 ways, for example, as 273240900 + 3617902201 = 16530^2 + 60149^2 .

It is a cyclic number.

It is not a de Polignac number, because 3891143101 - 2¹⁹ = 3890618813 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 (3891143111) 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, 21860266 + ... + 21860443.

It is an arithmetic number, because the mean of its divisors is an integer number (983715975).

Almost surely, 2^3891143101 is an apocalyptic number.

It is an amenable number.

3891143101 is a deficient number, since it is larger than the sum of its proper divisors (43720799).

3891143101 is an equidigital number, since it uses as much as digits as its factorization.

3891143101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43720798.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 3891143101 is about 62379.0277336863. The cubic root of 3891143101 is about 1572.8684494985.

The spelling of 3891143101 in words is "three billion, eight hundred ninety-one million, one hundred forty-three thousand, one hundred one".