384731647 has 2 divisors, whose sum is σ = 384731648. Its totient is φ = 384731646.

The previous prime is 384731639. The next prime is 384731651. The reversal of 384731647 is 746137483.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 384731647 - 2³ = 384731639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384735647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192365823 + 192365824.

It is an arithmetic number, because the mean of its divisors is an integer number (192365824).

Almost surely, 2^384731647 is an apocalyptic number.

384731647 is a deficient number, since it is larger than the sum of its proper divisors (1).

384731647 is an equidigital number, since it uses as much as digits as its factorization.

384731647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 43.

The square root of 384731647 is about 19614.5774106913. The cubic root of 384731647 is about 727.3095730182.

The spelling of 384731647 in words is "three hundred eighty-four million, seven hundred thirty-one thousand, six hundred forty-seven".