384915229 has 2 divisors, whose sum is σ = 384915230. Its totient is φ = 384915228.

The previous prime is 384915227. The next prime is 384915259. The reversal of 384915229 is 922519483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320947225 + 63968004 = 17915^2 + 7998^2 .

It is a cyclic number.

It is not a de Polignac number, because 384915229 - 2¹ = 384915227 is a prime.

It is a super-2 number, since 2×384915229² = 296319467032244882, which contains 22 as substring.

Together with 384915227, 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 (384915221) 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, 192457614 + 192457615.

It is an arithmetic number, because the mean of its divisors is an integer number (192457615).

Almost surely, 2^384915229 is an apocalyptic number.

It is an amenable number.

384915229 is a deficient number, since it is larger than the sum of its proper divisors (1).

384915229 is an equidigital number, since it uses as much as digits as its factorization.

384915229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 384915229 is about 19619.2565863236. The cubic root of 384915229 is about 727.4252378072.

The spelling of 384915229 in words is "three hundred eighty-four million, nine hundred fifteen thousand, two hundred twenty-nine".