384124021 has 2 divisors, whose sum is σ = 384124022. Its totient is φ = 384124020.

The previous prime is 384124003. The next prime is 384124049. The reversal of 384124021 is 120421483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351975121 + 32148900 = 18761^2 + 5670^2 .

It is a cyclic number.

It is not a de Polignac number, because 384124021 - 2¹¹ = 384121973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384124051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192062010 + 192062011.

It is an arithmetic number, because the mean of its divisors is an integer number (192062011).

Almost surely, 2^384124021 is an apocalyptic number.

It is an amenable number.

384124021 is a deficient number, since it is larger than the sum of its proper divisors (1).

384124021 is an equidigital number, since it uses as much as digits as its factorization.

384124021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 384124021 is about 19599.0821468762. The cubic root of 384124021 is about 726.9264790966.

The spelling of 384124021 in words is "three hundred eighty-four million, one hundred twenty-four thousand, twenty-one".