609890111 has 2 divisors, whose sum is σ = 609890112. Its totient is φ = 609890110.

The previous prime is 609890077. The next prime is 609890117. The reversal of 609890111 is 111098906.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609890111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609890117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304945055 + 304945056.

It is an arithmetic number, because the mean of its divisors is an integer number (304945056).

Almost surely, 2^609890111 is an apocalyptic number.

609890111 is a deficient number, since it is larger than the sum of its proper divisors (1).

609890111 is an equidigital number, since it uses as much as digits as its factorization.

609890111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 609890111 is about 24695.9533324794. The cubic root of 609890111 is about 848.0416789879.

The spelling of 609890111 in words is "six hundred nine million, eight hundred ninety thousand, one hundred eleven".