57687389 has 2 divisors, whose sum is σ = 57687390. Its totient is φ = 57687388.

The previous prime is 57687379. The next prime is 57687419. The reversal of 57687389 is 98378675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57684025 + 3364 = 7595^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 57687389 - 2¹² = 57683293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57687389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57687349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28843694 + 28843695.

It is an arithmetic number, because the mean of its divisors is an integer number (28843695).

Almost surely, 2^57687389 is an apocalyptic number.

It is an amenable number.

57687389 is a deficient number, since it is larger than the sum of its proper divisors (1).

57687389 is an equidigital number, since it uses as much as digits as its factorization.

57687389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The square root of 57687389 is about 7595.2214582591. The cubic root of 57687389 is about 386.3909633753.

The spelling of 57687389 in words is "fifty-seven million, six hundred eighty-seven thousand, three hundred eighty-nine".