384089621 has 2 divisors, whose sum is σ = 384089622. Its totient is φ = 384089620.

The previous prime is 384089603. The next prime is 384089669. The reversal of 384089621 is 126980483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270240721 + 113848900 = 16439^2 + 10670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-384089621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384089821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192044810 + 192044811.

It is an arithmetic number, because the mean of its divisors is an integer number (192044811).

Almost surely, 2^384089621 is an apocalyptic number.

It is an amenable number.

384089621 is a deficient number, since it is larger than the sum of its proper divisors (1).

384089621 is an equidigital number, since it uses as much as digits as its factorization.

384089621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 384089621 is about 19598.2045351098. The cubic root of 384089621 is about 726.9047786249.

The spelling of 384089621 in words is "three hundred eighty-four million, eighty-nine thousand, six hundred twenty-one".