51149089 has 2 divisors, whose sum is σ = 51149090. Its totient is φ = 51149088.

The previous prime is 51149051. The next prime is 51149149. The reversal of 51149089 is 98094115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49280400 + 1868689 = 7020^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 51149089 - 2⁷ = 51148961 is a prime.

It is not a weakly prime, because it can be changed into another prime (51149009) 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, 25574544 + 25574545.

It is an arithmetic number, because the mean of its divisors is an integer number (25574545).

Almost surely, 2^51149089 is an apocalyptic number.

It is an amenable number.

51149089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51149089 is an equidigital number, since it uses as much as digits as its factorization.

51149089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 51149089 is about 7151.8591289258. The cubic root of 51149089 is about 371.2039888260.

The spelling of 51149089 in words is "fifty-one million, one hundred forty-nine thousand, eighty-nine".