2389987205 has 8 divisors (see below), whose sum is σ = 2871077400. Its totient is φ = 1909927936.

The previous prime is 2389987189. The next prime is 2389987231. The reversal of 2389987205 is 5027899832.

2389987205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 35117476 + 2354869729 = 5926^2 + 48527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2389987205 - 2⁴ = 2389987189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252620 + ... + 261909.

It is an arithmetic number, because the mean of its divisors is an integer number (358884675).

Almost surely, 2^2389987205 is an apocalyptic number.

It is an amenable number.

2389987205 is a deficient number, since it is larger than the sum of its proper divisors (481090195).

2389987205 is an equidigital number, since it uses as much as digits as its factorization.

2389987205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515463.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 2389987205 is about 48887.4953848119. The cubic root of 2389987205 is about 1337.0013895953.

The spelling of 2389987205 in words is "two billion, three hundred eighty-nine million, nine hundred eighty-seven thousand, two hundred five".