51628693 has 2 divisors, whose sum is σ = 51628694. Its totient is φ = 51628692.

The previous prime is 51628691. The next prime is 51628723. The reversal of 51628693 is 39682615.

51628693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37051569 + 14577124 = 6087^2 + 3818^2 .

It is a cyclic number.

It is not a de Polignac number, because 51628693 - 2¹ = 51628691 is a prime.

Together with 51628691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51628691) 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, 25814346 + 25814347.

It is an arithmetic number, because the mean of its divisors is an integer number (25814347).

Almost surely, 2^51628693 is an apocalyptic number.

It is an amenable number.

51628693 is a deficient number, since it is larger than the sum of its proper divisors (1).

51628693 is an equidigital number, since it uses as much as digits as its factorization.

51628693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 51628693 is about 7185.3109188121. The cubic root of 51628693 is about 372.3605904456.

The spelling of 51628693 in words is "fifty-one million, six hundred twenty-eight thousand, six hundred ninety-three".