387111734909 has 2 divisors, whose sum is σ = 387111734910. Its totient is φ = 387111734908.

The previous prime is 387111734881. The next prime is 387111734921. The reversal of 387111734909 is 909437111783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353047495684 + 34064239225 = 594178^2 + 184565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387111734909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387111734929) 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, 193555867454 + 193555867455.

It is an arithmetic number, because the mean of its divisors is an integer number (193555867455).

Almost surely, 2^387111734909 is an apocalyptic number.

It is an amenable number.

387111734909 is a deficient number, since it is larger than the sum of its proper divisors (1).

387111734909 is an equidigital number, since it uses as much as digits as its factorization.

387111734909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 387111734909 in words is "three hundred eighty-seven billion, one hundred eleven million, seven hundred thirty-four thousand, nine hundred nine".