5128999 has 2 divisors, whose sum is σ = 5129000. Its totient is φ = 5128998.

The previous prime is 5128987. The next prime is 5129011. The reversal of 5128999 is 9998215.

It is a balanced prime because it is at equal distance from previous prime (5128987) and next prime (5129011).

It is a cyclic number.

It is not a de Polignac number, because 5128999 - 2⁵ = 5128967 is a prime.

5128999 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5128909) 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, 2564499 + 2564500.

It is an arithmetic number, because the mean of its divisors is an integer number (2564500).

Almost surely, 2^5128999 is an apocalyptic number.

5128999 is a deficient number, since it is larger than the sum of its proper divisors (1).

5128999 is an equidigital number, since it uses as much as digits as its factorization.

5128999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 43.

The square root of 5128999 is about 2264.7293436523. The cubic root of 5128999 is about 172.4556940052.

The spelling of 5128999 in words is "five million, one hundred twenty-eight thousand, nine hundred ninety-nine".