611894889 has 12 divisors (see below), whose sum is σ = 935839476. Its totient is φ = 383933952.

The previous prime is 611894879. The next prime is 611894893. The reversal of 611894889 is 988498116.

It can be written as a sum of positive squares in 2 ways, for example, as 341621289 + 270273600 = 18483^2 + 16440^2 .

It is not a de Polignac number, because 611894889 - 2²⁸ = 343459433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (611894839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1999504 + ... + 1999809.

It is an arithmetic number, because the mean of its divisors is an integer number (77986623).

Almost surely, 2^611894889 is an apocalyptic number.

It is an amenable number.

611894889 is a deficient number, since it is larger than the sum of its proper divisors (323944587).

611894889 is a wasteful number, since it uses less digits than its factorization.

611894889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999336 (or 3999333 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 611894889 is about 24736.5092323068. The cubic root of 611894889 is about 848.9698657869.

The spelling of 611894889 in words is "six hundred eleven million, eight hundred ninety-four thousand, eight hundred eighty-nine".