384501021 has 4 divisors (see below), whose sum is σ = 512668032. Its totient is φ = 256334012.

The previous prime is 384501017. The next prime is 384501037. The reversal of 384501021 is 120105483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 384501021 - 2² = 384501017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 384500982 and 384501000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384501421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64083501 + ... + 64083506.

It is an arithmetic number, because the mean of its divisors is an integer number (128167008).

Almost surely, 2^384501021 is an apocalyptic number.

It is an amenable number.

384501021 is a deficient number, since it is larger than the sum of its proper divisors (128167011).

384501021 is a wasteful number, since it uses less digits than its factorization.

384501021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128167010.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 384501021 is about 19608.6975855104. The cubic root of 384501021 is about 727.1642162685.

The spelling of 384501021 in words is "three hundred eighty-four million, five hundred one thousand, twenty-one".