611000191 has 2 divisors, whose sum is σ = 611000192. Its totient is φ = 611000190.

The previous prime is 611000161. The next prime is 611000231. The reversal of 611000191 is 191000116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611000191 - 2²¹ = 608903039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611000161) 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, 305500095 + 305500096.

It is an arithmetic number, because the mean of its divisors is an integer number (305500096).

Almost surely, 2^611000191 is an apocalyptic number.

611000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

611000191 is an equidigital number, since it uses as much as digits as its factorization.

611000191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 611000191 is about 24718.4180521327. The cubic root of 611000191 is about 848.5558828383. Note that the first 3 decimals are identical.

The spelling of 611000191 in words is "six hundred eleven million, one hundred ninety-one", and thus it is an aban number.