611887 has 2 divisors, whose sum is σ = 611888. Its totient is φ = 611886.

The previous prime is 611879. The next prime is 611903. The reversal of 611887 is 788116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611887 - 2³ = 611879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305943 + 305944.

It is an arithmetic number, because the mean of its divisors is an integer number (305944).

2⁶¹¹⁸⁸⁷ is an apocalyptic number.

611887 is a deficient number, since it is larger than the sum of its proper divisors (1).

611887 is an equidigital number, since it uses as much as digits as its factorization.

611887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The square root of 611887 is about 782.2320627538. The cubic root of 611887 is about 84.8966217256.

The spelling of 611887 in words is "six hundred eleven thousand, eight hundred eighty-seven".