2133855389 has 2 divisors, whose sum is σ = 2133855390. Its totient is φ = 2133855388.

The previous prime is 2133855307. The next prime is 2133855431. The reversal of 2133855389 is 9835583312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1620062500 + 513792889 = 40250^2 + 22667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2133855389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2133855089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066927694 + 1066927695.

It is an arithmetic number, because the mean of its divisors is an integer number (1066927695).

Almost surely, 2^2133855389 is an apocalyptic number.

It is an amenable number.

2133855389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133855389 is an equidigital number, since it uses as much as digits as its factorization.

2133855389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 47.

The square root of 2133855389 is about 46193.6726078367. The cubic root of 2133855389 is about 1287.4241790773.

The spelling of 2133855389 in words is "two billion, one hundred thirty-three million, eight hundred fifty-five thousand, three hundred eighty-nine".