387285329 has 2 divisors, whose sum is σ = 387285330. Its totient is φ = 387285328.

The previous prime is 387285317. The next prime is 387285331. The reversal of 387285329 is 923582783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263185729 + 124099600 = 16223^2 + 11140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387285329 is a prime.

It is a Sophie Germain prime.

Together with 387285331, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (387285629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193642664 + 193642665.

It is an arithmetic number, because the mean of its divisors is an integer number (193642665).

Almost surely, 2^387285329 is an apocalyptic number.

It is an amenable number.

387285329 is a deficient number, since it is larger than the sum of its proper divisors (1).

387285329 is an equidigital number, since it uses as much as digits as its factorization.

387285329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 387285329 is about 19679.5662807898. The cubic root of 387285329 is about 728.9152143443.

The spelling of 387285329 in words is "three hundred eighty-seven million, two hundred eighty-five thousand, three hundred twenty-nine".