384899947 has 2 divisors, whose sum is σ = 384899948. Its totient is φ = 384899946.

The previous prime is 384899909. The next prime is 384899969. The reversal of 384899947 is 749998483.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-384899947 is a prime.

It is not a weakly prime, because it can be changed into another prime (384899987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192449973 + 192449974.

It is an arithmetic number, because the mean of its divisors is an integer number (192449974).

Almost surely, 2^384899947 is an apocalyptic number.

384899947 is a deficient number, since it is larger than the sum of its proper divisors (1).

384899947 is an equidigital number, since it uses as much as digits as its factorization.

384899947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 61.

The square root of 384899947 is about 19618.8671181595. The cubic root of 384899947 is about 727.4156108740.

The spelling of 384899947 in words is "three hundred eighty-four million, eight hundred ninety-nine thousand, nine hundred forty-seven".