385280839 has 2 divisors, whose sum is σ = 385280840. Its totient is φ = 385280838.

The previous prime is 385280837. The next prime is 385280881. The reversal of 385280839 is 938082583.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385280839 - 2¹ = 385280837 is a prime.

Together with 385280837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385280837) 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, 192640419 + 192640420.

It is an arithmetic number, because the mean of its divisors is an integer number (192640420).

Almost surely, 2^385280839 is an apocalyptic number.

385280839 is a deficient number, since it is larger than the sum of its proper divisors (1).

385280839 is an equidigital number, since it uses as much as digits as its factorization.

385280839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 385280839 is about 19628.5720061343. The cubic root of 385280839 is about 727.6554787889.

The spelling of 385280839 in words is "three hundred eighty-five million, two hundred eighty thousand, eight hundred thirty-nine".