57681373 has 2 divisors, whose sum is σ = 57681374. Its totient is φ = 57681372.

The previous prime is 57681317. The next prime is 57681413. The reversal of 57681373 is 37318675.

It is an a-pointer prime, because the next prime (57681413) can be obtained adding 57681373 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57123364 + 558009 = 7558^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 57681373 - 2¹³ = 57673181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57681313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28840686 + 28840687.

It is an arithmetic number, because the mean of its divisors is an integer number (28840687).

Almost surely, 2^57681373 is an apocalyptic number.

It is an amenable number.

57681373 is a deficient number, since it is larger than the sum of its proper divisors (1).

57681373 is an equidigital number, since it uses as much as digits as its factorization.

57681373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 57681373 is about 7594.8254094482. The cubic root of 57681373 is about 386.3775311568.

The spelling of 57681373 in words is "fifty-seven million, six hundred eighty-one thousand, three hundred seventy-three".