51663089 has 2 divisors, whose sum is σ = 51663090. Its totient is φ = 51663088.

The previous prime is 51663047. The next prime is 51663091. The reversal of 51663089 is 98036615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51595489 + 67600 = 7183^2 + 260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51663089 is a prime.

Together with 51663091, 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 (51663389) 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, 25831544 + 25831545.

It is an arithmetic number, because the mean of its divisors is an integer number (25831545).

Almost surely, 2^51663089 is an apocalyptic number.

It is an amenable number.

51663089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51663089 is an equidigital number, since it uses as much as digits as its factorization.

51663089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 51663089 is about 7187.7040144959. The cubic root of 51663089 is about 372.4432632834.

The spelling of 51663089 in words is "fifty-one million, six hundred sixty-three thousand, eighty-nine".