57278077 has 2 divisors, whose sum is σ = 57278078. Its totient is φ = 57278076.

The previous prime is 57278071. The next prime is 57278129. The reversal of 57278077 is 77087275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47969476 + 9308601 = 6926^2 + 3051^2 .

It is a cyclic number.

It is not a de Polignac number, because 57278077 - 2³ = 57278069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57278071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28639038 + 28639039.

It is an arithmetic number, because the mean of its divisors is an integer number (28639039).

Almost surely, 2^57278077 is an apocalyptic number.

It is an amenable number.

57278077 is a deficient number, since it is larger than the sum of its proper divisors (1).

57278077 is an equidigital number, since it uses as much as digits as its factorization.

57278077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192080, while the sum is 43.

The square root of 57278077 is about 7568.2281281684. The cubic root of 57278077 is about 385.4749342063.

The spelling of 57278077 in words is "fifty-seven million, two hundred seventy-eight thousand, seventy-seven".