51560689 has 2 divisors, whose sum is σ = 51560690. Its totient is φ = 51560688.

The previous prime is 51560659. The next prime is 51560713. The reversal of 51560689 is 98606515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32490000 + 19070689 = 5700^2 + 4367^2 .

It is a cyclic number.

It is not a de Polignac number, because 51560689 - 2¹³ = 51552497 is a prime.

It is not a weakly prime, because it can be changed into another prime (51560629) 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, 25780344 + 25780345.

It is an arithmetic number, because the mean of its divisors is an integer number (25780345).

Almost surely, 2^51560689 is an apocalyptic number.

It is an amenable number.

51560689 is a deficient number, since it is larger than the sum of its proper divisors (1).

51560689 is an equidigital number, since it uses as much as digits as its factorization.

51560689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 51560689 is about 7180.5772052113. The cubic root of 51560689 is about 372.1970306491.

The spelling of 51560689 in words is "fifty-one million, five hundred sixty thousand, six hundred eighty-nine".