57280397 has 2 divisors, whose sum is σ = 57280398. Its totient is φ = 57280396.

The previous prime is 57280387. The next prime is 57280411. The reversal of 57280397 is 79308275.

57280397 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., 37039396 + 20241001 = 6086^2 + 4499^2 .

It is a cyclic number.

It is not a de Polignac number, because 57280397 - 2⁸ = 57280141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57280387) 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, 28640198 + 28640199.

It is an arithmetic number, because the mean of its divisors is an integer number (28640199).

Almost surely, 2^57280397 is an apocalyptic number.

It is an amenable number.

57280397 is a deficient number, since it is larger than the sum of its proper divisors (1).

57280397 is an equidigital number, since it uses as much as digits as its factorization.

57280397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 57280397 is about 7568.3813989518. The cubic root of 57280397 is about 385.4801385813.

The spelling of 57280397 in words is "fifty-seven million, two hundred eighty thousand, three hundred ninety-seven".