4243508091 has 18 divisors (see below), whose sum is σ = 6511284572. Its totient is φ = 2662591680.

The previous prime is 4243508083. The next prime is 4243508099. The reversal of 4243508091 is 1908053424.

It is an interprime number because it is at equal distance from previous prime (4243508083) and next prime (4243508099).

It is not a de Polignac number, because 4243508091 - 2³ = 4243508083 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4243508099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 813145 + ... + 818346.

Almost surely, 2^4243508091 is an apocalyptic number.

4243508091 is a deficient number, since it is larger than the sum of its proper divisors (2267776481).

4243508091 is a wasteful number, since it uses less digits than its factorization.

4243508091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631531 (or 1631511 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 4243508091 is about 65142.2143544415. The cubic root of 4243508091 is about 1618.9807248512.

The spelling of 4243508091 in words is "four billion, two hundred forty-three million, five hundred eight thousand, ninety-one".