384157009 has 2 divisors, whose sum is σ = 384157010. Its totient is φ = 384157008.

The previous prime is 384157001. The next prime is 384157049. The reversal of 384157009 is 900751483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240157009 + 144000000 = 15497^2 + 12000^2 .

It is a cyclic number.

It is not a de Polignac number, because 384157009 - 2³ = 384157001 is a prime.

It is not a weakly prime, because it can be changed into another prime (384157001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192078504 + 192078505.

It is an arithmetic number, because the mean of its divisors is an integer number (192078505).

Almost surely, 2^384157009 is an apocalyptic number.

It is an amenable number.

384157009 is a deficient number, since it is larger than the sum of its proper divisors (1).

384157009 is an equidigital number, since it uses as much as digits as its factorization.

384157009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 384157009 is about 19599.9236988311. The cubic root of 384157009 is about 726.9472876228.

The spelling of 384157009 in words is "three hundred eighty-four million, one hundred fifty-seven thousand, nine".