51750689 has 2 divisors, whose sum is σ = 51750690. Its totient is φ = 51750688.

The previous prime is 51750641. The next prime is 51750691. The reversal of 51750689 is 98605715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26419600 + 25331089 = 5140^2 + 5033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51750689 is a prime.

Together with 51750691, 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 (51750289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25875344 + 25875345.

It is an arithmetic number, because the mean of its divisors is an integer number (25875345).

Almost surely, 2^51750689 is an apocalyptic number.

It is an amenable number.

51750689 is a deficient number, since it is larger than the sum of its proper divisors (1).

51750689 is an equidigital number, since it uses as much as digits as its factorization.

51750689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 51750689 is about 7193.7951736201. The cubic root of 51750689 is about 372.6536495095.

The spelling of 51750689 in words is "fifty-one million, seven hundred fifty thousand, six hundred eighty-nine".