611940853 has 2 divisors, whose sum is σ = 611940854. Its totient is φ = 611940852.

The previous prime is 611940851. The next prime is 611940863. The reversal of 611940853 is 358049116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422795844 + 189145009 = 20562^2 + 13753^2 .

It is a cyclic number.

It is not a de Polignac number, because 611940853 - 2¹ = 611940851 is a prime.

Together with 611940851, 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 (611940851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305970426 + 305970427.

It is an arithmetic number, because the mean of its divisors is an integer number (305970427).

Almost surely, 2^611940853 is an apocalyptic number.

It is an amenable number.

611940853 is a deficient number, since it is larger than the sum of its proper divisors (1).

611940853 is an equidigital number, since it uses as much as digits as its factorization.

611940853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 611940853 is about 24737.4382869367. The cubic root of 611940853 is about 848.9911227460.

Adding to 611940853 its reverse (358049116), we get a palindrome (969989969).

The spelling of 611940853 in words is "six hundred eleven million, nine hundred forty thousand, eight hundred fifty-three".