51350989 has 2 divisors, whose sum is σ = 51350990. Its totient is φ = 51350988.

The previous prime is 51350951. The next prime is 51351043. The reversal of 51350989 is 98905315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50836900 + 514089 = 7130^2 + 717^2 .

It is a cyclic number.

It is not a de Polignac number, because 51350989 - 2⁷ = 51350861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51350389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25675494 + 25675495.

It is an arithmetic number, because the mean of its divisors is an integer number (25675495).

Almost surely, 2^51350989 is an apocalyptic number.

It is an amenable number.

51350989 is a deficient number, since it is larger than the sum of its proper divisors (1).

51350989 is an equidigital number, since it uses as much as digits as its factorization.

51350989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 51350989 is about 7165.9604380711. The cubic root of 51350989 is about 371.6917634948.

The spelling of 51350989 in words is "fifty-one million, three hundred fifty thousand, nine hundred eighty-nine".