51008849 has 2 divisors, whose sum is σ = 51008850. Its totient is φ = 51008848.

The previous prime is 51008831. The next prime is 51008851. The reversal of 51008849 is 94880015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43890625 + 7118224 = 6625^2 + 2668^2 .

It is a cyclic number.

It is not a de Polignac number, because 51008849 - 2¹² = 51004753 is a prime.

Together with 51008851, 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 (51008819) 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, 25504424 + 25504425.

It is an arithmetic number, because the mean of its divisors is an integer number (25504425).

Almost surely, 2^51008849 is an apocalyptic number.

It is an amenable number.

51008849 is a deficient number, since it is larger than the sum of its proper divisors (1).

51008849 is an equidigital number, since it uses as much as digits as its factorization.

51008849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 51008849 is about 7142.0479555937. The cubic root of 51008849 is about 370.8644239836.

The spelling of 51008849 in words is "fifty-one million, eight thousand, eight hundred forty-nine".