5999663 has 2 divisors, whose sum is σ = 5999664. Its totient is φ = 5999662.

The previous prime is 5999639. The next prime is 5999677. The reversal of 5999663 is 3669995.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5999663 - 2⁶ = 5999599 is a prime.

It is a super-2 number, since 2×5999663² = 71991912227138, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5999603) 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, 2999831 + 2999832.

It is an arithmetic number, because the mean of its divisors is an integer number (2999832).

Almost surely, 2^5999663 is an apocalyptic number.

5999663 is a deficient number, since it is larger than the sum of its proper divisors (1).

5999663 is an equidigital number, since it uses as much as digits as its factorization.

5999663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 393660, while the sum is 47.

The square root of 5999663 is about 2449.4209519803. The cubic root of 5999663 is about 181.7086571660.

The spelling of 5999663 in words is "five million, nine hundred ninety-nine thousand, six hundred sixty-three".