384948989 has 2 divisors, whose sum is σ = 384948990. Its totient is φ = 384948988.

The previous prime is 384948973. The next prime is 384949009. The reversal of 384948989 is 989849483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262116100 + 122832889 = 16190^2 + 11083^2 .

It is a cyclic number.

It is not a de Polignac number, because 384948989 - 2⁴ = 384948973 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 (384948689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192474494 + 192474495.

It is an arithmetic number, because the mean of its divisors is an integer number (192474495).

Almost surely, 2^384948989 is an apocalyptic number.

It is an amenable number.

384948989 is a deficient number, since it is larger than the sum of its proper divisors (1).

384948989 is an equidigital number, since it uses as much as digits as its factorization.

384948989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 62.

The square root of 384948989 is about 19620.1169466443. The cubic root of 384948989 is about 727.4465040984.

The spelling of 384948989 in words is "three hundred eighty-four million, nine hundred forty-eight thousand, nine hundred eighty-nine".