51650789 has 2 divisors, whose sum is σ = 51650790. Its totient is φ = 51650788.

The previous prime is 51650771. The next prime is 51650813. The reversal of 51650789 is 98705615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38812900 + 12837889 = 6230^2 + 3583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51650789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51650089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25825394 + 25825395.

It is an arithmetic number, because the mean of its divisors is an integer number (25825395).

Almost surely, 2^51650789 is an apocalyptic number.

It is an amenable number.

51650789 is a deficient number, since it is larger than the sum of its proper divisors (1).

51650789 is an equidigital number, since it uses as much as digits as its factorization.

51650789 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 51650789 is about 7186.8483356754. The cubic root of 51650789 is about 372.4137037156.

The spelling of 51650789 in words is "fifty-one million, six hundred fifty thousand, seven hundred eighty-nine".