3891523489 has 16 divisors (see below), whose sum is σ = 4507148800. Its totient is φ = 3290886144.

The previous prime is 3891523481. The next prime is 3891523523. The reversal of 3891523489 is 9843251983.

It is not a de Polignac number, because 3891523489 - 2³ = 3891523481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3891523481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1445857 + ... + 1448545.

It is an arithmetic number, because the mean of its divisors is an integer number (281696800).

Almost surely, 2^3891523489 is an apocalyptic number.

It is an amenable number.

3891523489 is a deficient number, since it is larger than the sum of its proper divisors (615625311).

3891523489 is a wasteful number, since it uses less digits than its factorization.

3891523489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392.

The product of its digits is 1866240, while the sum is 52.

The square root of 3891523489 is about 62382.0766646959. The cubic root of 3891523489 is about 1572.9197010008.

The spelling of 3891523489 in words is "three billion, eight hundred ninety-one million, five hundred twenty-three thousand, four hundred eighty-nine".