2159089138 has 4 divisors (see below), whose sum is σ = 3238633710. Its totient is φ = 1079544568.

The previous prime is 2159089123. The next prime is 2159089139. The reversal of 2159089138 is 8319809512.

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

It can be written as a sum of positive squares in only one way, i.e., 1724491729 + 434597409 = 41527^2 + 20847^2 .

It is not an unprimeable number, because it can be changed into a prime (2159089139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539772283 + ... + 539772286.

Almost surely, 2^2159089138 is an apocalyptic number.

2159089138 is a deficient number, since it is larger than the sum of its proper divisors (1079544572).

2159089138 is a wasteful number, since it uses less digits than its factorization.

2159089138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079544571.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 2159089138 is about 46465.9998063100. Note that the first 3 decimals coincide. The cubic root of 2159089138 is about 1292.4790854451.

The spelling of 2159089138 in words is "two billion, one hundred fifty-nine million, eighty-nine thousand, one hundred thirty-eight".