385142239 has 2 divisors, whose sum is σ = 385142240. Its totient is φ = 385142238.

The previous prime is 385142237. The next prime is 385142267. The reversal of 385142239 is 932241583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385142239 - 2¹ = 385142237 is a prime.

Together with 385142237, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 385142198 and 385142207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385142237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192571119 + 192571120.

It is an arithmetic number, because the mean of its divisors is an integer number (192571120).

Almost surely, 2^385142239 is an apocalyptic number.

385142239 is a deficient number, since it is larger than the sum of its proper divisors (1).

385142239 is an equidigital number, since it uses as much as digits as its factorization.

385142239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 385142239 is about 19625.0411209760. The cubic root of 385142239 is about 727.5682133147.

The spelling of 385142239 in words is "three hundred eighty-five million, one hundred forty-two thousand, two hundred thirty-nine".