384999997 has 2 divisors, whose sum is σ = 384999998. Its totient is φ = 384999996.

The previous prime is 384999977. The next prime is 385000043. The reversal of 384999997 is 799999483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359709156 + 25290841 = 18966^2 + 5029^2 .

It is an emirp because it is prime and its reverse (799999483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 384999997 - 2¹⁹ = 384475709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384999947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192499998 + 192499999.

It is an arithmetic number, because the mean of its divisors is an integer number (192499999).

Almost surely, 2^384999997 is an apocalyptic number.

It is an amenable number.

384999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

384999997 is an equidigital number, since it uses as much as digits as its factorization.

384999997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39680928, while the sum is 67.

The square root of 384999997 is about 19621.4167939015. The cubic root of 384999997 is about 727.4786329896.

The spelling of 384999997 in words is "three hundred eighty-four million, nine hundred ninety-nine thousand, nine hundred ninety-seven".