3891469943 has 4 divisors (see below), whose sum is σ = 3981969288. Its totient is φ = 3800970600.

The previous prime is 3891469937. The next prime is 3891469957. The reversal of 3891469943 is 3499641983.

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 3891469943 - 2¹⁸ = 3891207799 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 (3891469913) 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, 45249608 + ... + 45249693.

It is an arithmetic number, because the mean of its divisors is an integer number (995492322).

Almost surely, 2^3891469943 is an apocalyptic number.

3891469943 is a deficient number, since it is larger than the sum of its proper divisors (90499345).

3891469943 is an equidigital number, since it uses as much as digits as its factorization.

3891469943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90499344.

The product of its digits is 5038848, while the sum is 56.

The square root of 3891469943 is about 62381.6474854584. The cubic root of 3891469943 is about 1572.9124866930.

The spelling of 3891469943 in words is "three billion, eight hundred ninety-one million, four hundred sixty-nine thousand, nine hundred forty-three".