387861602509 has 2 divisors, whose sum is σ = 387861602510. Its totient is φ = 387861602508.

The previous prime is 387861602489. The next prime is 387861602533. The reversal of 387861602509 is 905206168783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353923857225 + 33937745284 = 594915^2 + 184222^2 .

It is a cyclic number.

It is not a de Polignac number, because 387861602509 - 2⁹ = 387861601997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 387861602509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387861602539) 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, 193930801254 + 193930801255.

It is an arithmetic number, because the mean of its divisors is an integer number (193930801255).

Almost surely, 2^387861602509 is an apocalyptic number.

It is an amenable number.

387861602509 is a deficient number, since it is larger than the sum of its proper divisors (1).

387861602509 is an equidigital number, since it uses as much as digits as its factorization.

387861602509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 387861602509 in words is "three hundred eighty-seven billion, eight hundred sixty-one million, six hundred two thousand, five hundred nine".