611881841 has 2 divisors, whose sum is σ = 611881842. Its totient is φ = 611881840.

The previous prime is 611881819. The next prime is 611881843. The reversal of 611881841 is 148188116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 589518400 + 22363441 = 24280^2 + 4729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611881841 is a prime.

Together with 611881843, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 611881795 and 611881804.

It is not a weakly prime, because it can be changed into another prime (611881843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305940920 + 305940921.

It is an arithmetic number, because the mean of its divisors is an integer number (305940921).

Almost surely, 2^611881841 is an apocalyptic number.

It is an amenable number.

611881841 is a deficient number, since it is larger than the sum of its proper divisors (1).

611881841 is an equidigital number, since it uses as much as digits as its factorization.

611881841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 38.

The square root of 611881841 is about 24736.2454911816. The cubic root of 611881841 is about 848.9638312877.

The spelling of 611881841 in words is "six hundred eleven million, eight hundred eighty-one thousand, eight hundred forty-one".