611318893 has 2 divisors, whose sum is σ = 611318894. Its totient is φ = 611318892.

The previous prime is 611318891. The next prime is 611318899. The reversal of 611318893 is 398813116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606242884 + 5076009 = 24622^2 + 2253^2 .

It is a cyclic number.

It is not a de Polignac number, because 611318893 - 2¹ = 611318891 is a prime.

Together with 611318891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611318891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305659446 + 305659447.

It is an arithmetic number, because the mean of its divisors is an integer number (305659447).

Almost surely, 2^611318893 is an apocalyptic number.

It is an amenable number.

611318893 is a deficient number, since it is larger than the sum of its proper divisors (1).

611318893 is an equidigital number, since it uses as much as digits as its factorization.

611318893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 611318893 is about 24724.8638621126. The cubic root of 611318893 is about 848.7033947671.

The spelling of 611318893 in words is "six hundred eleven million, three hundred eighteen thousand, eight hundred ninety-three".