384933281 has 2 divisors, whose sum is σ = 384933282. Its totient is φ = 384933280.

The previous prime is 384933251. The next prime is 384933301. The reversal of 384933281 is 182339483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307651600 + 77281681 = 17540^2 + 8791^2 .

It is an emirp because it is prime and its reverse (182339483) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-384933281 is a prime.

It is a super-2 number, since 2×384933281² = 296347261642849922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (384933251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192466640 + 192466641.

It is an arithmetic number, because the mean of its divisors is an integer number (192466641).

Almost surely, 2^384933281 is an apocalyptic number.

It is an amenable number.

384933281 is a deficient number, since it is larger than the sum of its proper divisors (1).

384933281 is an equidigital number, since it uses as much as digits as its factorization.

384933281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 384933281 is about 19619.7166391363. The cubic root of 384933281 is about 727.4366093804.

The spelling of 384933281 in words is "three hundred eighty-four million, nine hundred thirty-three thousand, two hundred eighty-one".