387389239 has 2 divisors, whose sum is σ = 387389240. Its totient is φ = 387389238.

The previous prime is 387389227. The next prime is 387389263. The reversal of 387389239 is 932983783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 387389239 - 2¹³ = 387381047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387389539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193694619 + 193694620.

It is an arithmetic number, because the mean of its divisors is an integer number (193694620).

Almost surely, 2^387389239 is an apocalyptic number.

387389239 is a deficient number, since it is larger than the sum of its proper divisors (1).

387389239 is an equidigital number, since it uses as much as digits as its factorization.

387389239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 52.

The square root of 387389239 is about 19682.2061517504. The cubic root of 387389239 is about 728.9803986769.

The spelling of 387389239 in words is "three hundred eighty-seven million, three hundred eighty-nine thousand, two hundred thirty-nine".