51728077 has 2 divisors, whose sum is σ = 51728078. Its totient is φ = 51728076.

The previous prime is 51728071. The next prime is 51728099. The reversal of 51728077 is 77082715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43283241 + 8444836 = 6579^2 + 2906^2 .

It is a cyclic number.

It is not a de Polignac number, because 51728077 - 2³ = 51728069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51728071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25864038 + 25864039.

It is an arithmetic number, because the mean of its divisors is an integer number (25864039).

Almost surely, 2^51728077 is an apocalyptic number.

It is an amenable number.

51728077 is a deficient number, since it is larger than the sum of its proper divisors (1).

51728077 is an equidigital number, since it uses as much as digits as its factorization.

51728077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 51728077 is about 7192.2233697237. The cubic root of 51728077 is about 372.5993657111.

The spelling of 51728077 in words is "fifty-one million, seven hundred twenty-eight thousand, seventy-seven".