51605677 has 2 divisors, whose sum is σ = 51605678. Its totient is φ = 51605676.

The previous prime is 51605663. The next prime is 51605681. The reversal of 51605677 is 77650615.

51605677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36348841 + 15256836 = 6029^2 + 3906^2 .

It is a cyclic number.

It is not a de Polignac number, because 51605677 - 2⁷ = 51605549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51600677) 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, 25802838 + 25802839.

It is an arithmetic number, because the mean of its divisors is an integer number (25802839).

Almost surely, 2^51605677 is an apocalyptic number.

It is an amenable number.

51605677 is a deficient number, since it is larger than the sum of its proper divisors (1).

51605677 is an equidigital number, since it uses as much as digits as its factorization.

51605677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 51605677 is about 7183.7091394349. The cubic root of 51605677 is about 372.3052496090.

The spelling of 51605677 in words is "fifty-one million, six hundred five thousand, six hundred seventy-seven".