5995991 has 2 divisors, whose sum is σ = 5995992. Its totient is φ = 5995990.

The previous prime is 5995973. The next prime is 5995999. The reversal of 5995991 is 1995995.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5995991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5995999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2997995 + 2997996.

It is an arithmetic number, because the mean of its divisors is an integer number (2997996).

Almost surely, 2^5995991 is an apocalyptic number.

5995991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5995991 is an equidigital number, since it uses as much as digits as its factorization.

5995991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164025, while the sum is 47.

The square root of 5995991 is about 2448.6712723434. The cubic root of 5995991 is about 181.6715789524.

The spelling of 5995991 in words is "five million, nine hundred ninety-five thousand, nine hundred ninety-one".