384921239 has 2 divisors, whose sum is σ = 384921240. Its totient is φ = 384921238.

The previous prime is 384921233. The next prime is 384921281. The reversal of 384921239 is 932129483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 384921239 - 2⁴ = 384921223 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 384921196 and 384921205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384921233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192460619 + 192460620.

It is an arithmetic number, because the mean of its divisors is an integer number (192460620).

Almost surely, 2^384921239 is an apocalyptic number.

384921239 is a deficient number, since it is larger than the sum of its proper divisors (1).

384921239 is an equidigital number, since it uses as much as digits as its factorization.

384921239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 384921239 is about 19619.4097515700. The cubic root of 384921239 is about 727.4290237516.

The spelling of 384921239 in words is "three hundred eighty-four million, nine hundred twenty-one thousand, two hundred thirty-nine".