51999089 has 2 divisors, whose sum is σ = 51999090. Its totient is φ = 51999088.

The previous prime is 51999071. The next prime is 51999091. The reversal of 51999089 is 98099915.

51999089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 2226064 = 7055^2 + 1492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51999089 is a prime.

Together with 51999091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51999019) 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, 25999544 + 25999545.

It is an arithmetic number, because the mean of its divisors is an integer number (25999545).

Almost surely, 2^51999089 is an apocalyptic number.

It is an amenable number.

51999089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51999089 is an equidigital number, since it uses as much as digits as its factorization.

51999089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 50.

The square root of 51999089 is about 7211.0393841665. The cubic root of 51999089 is about 373.2489359782.

The spelling of 51999089 in words is "fifty-one million, nine hundred ninety-nine thousand, eighty-nine".