386509139 has 2 divisors, whose sum is σ = 386509140. Its totient is φ = 386509138.

The previous prime is 386509117. The next prime is 386509157. The reversal of 386509139 is 931905683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 386509139 - 2⁸ = 386508883 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 386509139.

It is not a weakly prime, because it can be changed into another prime (386509339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193254569 + 193254570.

It is an arithmetic number, because the mean of its divisors is an integer number (193254570).

Almost surely, 2^386509139 is an apocalyptic number.

386509139 is a deficient number, since it is larger than the sum of its proper divisors (1).

386509139 is an equidigital number, since it uses as much as digits as its factorization.

386509139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 386509139 is about 19659.8356809003. The cubic root of 386509139 is about 728.4279292583.

The spelling of 386509139 in words is "three hundred eighty-six million, five hundred nine thousand, one hundred thirty-nine".