57645493 has 2 divisors, whose sum is σ = 57645494. Its totient is φ = 57645492.

The previous prime is 57645491. The next prime is 57645517. The reversal of 57645493 is 39454675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39853969 + 17791524 = 6313^2 + 4218^2 .

It is a cyclic number.

It is not a de Polignac number, because 57645493 - 2¹ = 57645491 is a prime.

Together with 57645491, 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 (57645491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28822746 + 28822747.

It is an arithmetic number, because the mean of its divisors is an integer number (28822747).

Almost surely, 2^57645493 is an apocalyptic number.

It is an amenable number.

57645493 is a deficient number, since it is larger than the sum of its proper divisors (1).

57645493 is an equidigital number, since it uses as much as digits as its factorization.

57645493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 43.

The square root of 57645493 is about 7592.4629073839. The cubic root of 57645493 is about 386.2974007174.

The spelling of 57645493 in words is "fifty-seven million, six hundred forty-five thousand, four hundred ninety-three".