4243555839 has 4 divisors (see below), whose sum is σ = 5658074456. Its totient is φ = 2829037224.

The previous prime is 4243555831. The next prime is 4243555843. The reversal of 4243555839 is 9385553424.

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

It is not a de Polignac number, because 4243555839 - 2³ = 4243555831 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 (4243555831) 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, 707259304 + ... + 707259309.

It is an arithmetic number, because the mean of its divisors is an integer number (1414518614).

Almost surely, 2^4243555839 is an apocalyptic number.

4243555839 is a deficient number, since it is larger than the sum of its proper divisors (1414518617).

4243555839 is a wasteful number, since it uses less digits than its factorization.

4243555839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414518616.

The product of its digits is 2592000, while the sum is 48.

The square root of 4243555839 is about 65142.5808438689. The cubic root of 4243555839 is about 1618.9867970915.

The spelling of 4243555839 in words is "four billion, two hundred forty-three million, five hundred fifty-five thousand, eight hundred thirty-nine".