2443913889 has 4 divisors (see below), whose sum is σ = 3258551856. Its totient is φ = 1629275924.

The previous prime is 2443913881. The next prime is 2443913903. The reversal of 2443913889 is 9883193442.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2443913889 - 2³ = 2443913881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2443913881) 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, 407318979 + ... + 407318984.

It is an arithmetic number, because the mean of its divisors is an integer number (814637964).

Almost surely, 2^2443913889 is an apocalyptic number.

It is an amenable number.

2443913889 is a deficient number, since it is larger than the sum of its proper divisors (814637967).

2443913889 is an equidigital number, since it uses as much as digits as its factorization.

2443913889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814637966.

The product of its digits is 1492992, while the sum is 51.

The square root of 2443913889 is about 49435.9574500181. The cubic root of 2443913889 is about 1346.9825406451.

The spelling of 2443913889 in words is "two billion, four hundred forty-three million, nine hundred thirteen thousand, eight hundred eighty-nine".