386540839 has 2 divisors, whose sum is σ = 386540840. Its totient is φ = 386540838.

The previous prime is 386540773. The next prime is 386540851. The reversal of 386540839 is 938045683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 386540839 - 2¹⁷ = 386409767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386540899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193270419 + 193270420.

It is an arithmetic number, because the mean of its divisors is an integer number (193270420).

Almost surely, 2^386540839 is an apocalyptic number.

386540839 is a deficient number, since it is larger than the sum of its proper divisors (1).

386540839 is an equidigital number, since it uses as much as digits as its factorization.

386540839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 386540839 is about 19660.6418766021. The cubic root of 386540839 is about 728.4478430039.

The spelling of 386540839 in words is "three hundred eighty-six million, five hundred forty thousand, eight hundred thirty-nine".