855733489 has 4 divisors (see below), whose sum is σ = 921559156. Its totient is φ = 789907824.

The previous prime is 855733433. The next prime is 855733531. The reversal of 855733489 is 984337558.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54390625 + 801342864 = 7375^2 + 28308^2 .

It is a cyclic number.

It is not a de Polignac number, because 855733489 - 2¹¹ = 855731441 is a prime.

It is a super-2 number, since 2×855733489² = 1464559608392226242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855733409) 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, 32912814 + ... + 32912839.

It is an arithmetic number, because the mean of its divisors is an integer number (230389789).

Almost surely, 2^855733489 is an apocalyptic number.

It is an amenable number.

855733489 is a deficient number, since it is larger than the sum of its proper divisors (65825667).

855733489 is a wasteful number, since it uses less digits than its factorization.

855733489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65825666.

The product of its digits is 3628800, while the sum is 52.

The square root of 855733489 is about 29252.9227428645. The cubic root of 855733489 is about 949.3933297449.

The spelling of 855733489 in words is "eight hundred fifty-five million, seven hundred thirty-three thousand, four hundred eighty-nine".