57081679 has 2 divisors, whose sum is σ = 57081680. Its totient is φ = 57081678.

The previous prime is 57081677. The next prime is 57081697. The reversal of 57081679 is 97618075.

Together with next prime (57081697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57081679 - 2¹ = 57081677 is a prime.

Together with 57081677, 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 (57081677) 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, 28540839 + 28540840.

It is an arithmetic number, because the mean of its divisors is an integer number (28540840).

Almost surely, 2^57081679 is an apocalyptic number.

57081679 is a deficient number, since it is larger than the sum of its proper divisors (1).

57081679 is an equidigital number, since it uses as much as digits as its factorization.

57081679 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 43.

The square root of 57081679 is about 7555.2418227347. The cubic root of 57081679 is about 385.0338509619.

The spelling of 57081679 in words is "fifty-seven million, eighty-one thousand, six hundred seventy-nine".