384478979 has 2 divisors, whose sum is σ = 384478980. Its totient is φ = 384478978.

The previous prime is 384478973. The next prime is 384478993. The reversal of 384478979 is 979874483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 384478979 - 2²⁸ = 116043523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (384478973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192239489 + 192239490.

It is an arithmetic number, because the mean of its divisors is an integer number (192239490).

Almost surely, 2^384478979 is an apocalyptic number.

384478979 is a deficient number, since it is larger than the sum of its proper divisors (1).

384478979 is an equidigital number, since it uses as much as digits as its factorization.

384478979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 59.

The square root of 384478979 is about 19608.1355309474. The cubic root of 384478979 is about 727.1503208048.

The spelling of 384478979 in words is "three hundred eighty-four million, four hundred seventy-eight thousand, nine hundred seventy-nine".