51302989 has 2 divisors, whose sum is σ = 51302990. Its totient is φ = 51302988.

The previous prime is 51302917. The next prime is 51303061. The reversal of 51302989 is 98920315.

51302989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (51302917) and next prime (51303061).

It can be written as a sum of positive squares in only one way, i.e., 36542025 + 14760964 = 6045^2 + 3842^2 .

It is a cyclic number.

It is not a de Polignac number, because 51302989 - 2⁹ = 51302477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51302389) 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, 25651494 + 25651495.

It is an arithmetic number, because the mean of its divisors is an integer number (25651495).

Almost surely, 2^51302989 is an apocalyptic number.

It is an amenable number.

51302989 is a deficient number, since it is larger than the sum of its proper divisors (1).

51302989 is an equidigital number, since it uses as much as digits as its factorization.

51302989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 51302989 is about 7162.6104878040. The cubic root of 51302989 is about 371.5759152456.

The spelling of 51302989 in words is "fifty-one million, three hundred two thousand, nine hundred eighty-nine".