5911987 has 2 divisors, whose sum is σ = 5911988. Its totient is φ = 5911986.

The previous prime is 5911981. The next prime is 5911993. The reversal of 5911987 is 7891195.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (5911981) and next prime (5911993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5911987 is a prime.

5911987 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5911981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2955993 + 2955994.

It is an arithmetic number, because the mean of its divisors is an integer number (2955994).

Almost surely, 2^5911987 is an apocalyptic number.

5911987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5911987 is an equidigital number, since it uses as much as digits as its factorization.

5911987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 40.

The square root of 5911987 is about 2431.4577931768. The cubic root of 5911987 is about 180.8191777990.

The spelling of 5911987 in words is "five million, nine hundred eleven thousand, nine hundred eighty-seven".