611326889 has 2 divisors, whose sum is σ = 611326890. Its totient is φ = 611326888.

The previous prime is 611326871. The next prime is 611326901. The reversal of 611326889 is 988623116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606883225 + 4443664 = 24635^2 + 2108^2 .

It is a cyclic number.

It is not a de Polignac number, because 611326889 - 2¹² = 611322793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (611326489) 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, 305663444 + 305663445.

It is an arithmetic number, because the mean of its divisors is an integer number (305663445).

Almost surely, 2^611326889 is an apocalyptic number.

It is an amenable number.

611326889 is a deficient number, since it is larger than the sum of its proper divisors (1).

611326889 is an equidigital number, since it uses as much as digits as its factorization.

611326889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 611326889 is about 24725.0255611597. The cubic root of 611326889 is about 848.7070950741.

The spelling of 611326889 in words is "six hundred eleven million, three hundred twenty-six thousand, eight hundred eighty-nine".