57640787 has 2 divisors, whose sum is σ = 57640788. Its totient is φ = 57640786.

The previous prime is 57640763. The next prime is 57640831. The reversal of 57640787 is 78704675.

It is an a-pointer prime, because the next prime (57640831) can be obtained adding 57640787 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57640787 - 2¹⁶ = 57575251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57645787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28820393 + 28820394.

It is an arithmetic number, because the mean of its divisors is an integer number (28820394).

Almost surely, 2^57640787 is an apocalyptic number.

57640787 is a deficient number, since it is larger than the sum of its proper divisors (1).

57640787 is an equidigital number, since it uses as much as digits as its factorization.

57640787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 57640787 is about 7592.1529884480. The cubic root of 57640787 is about 386.2868883891.

The spelling of 57640787 in words is "fifty-seven million, six hundred forty thousand, seven hundred eighty-seven".