493921979 has 2 divisors, whose sum is σ = 493921980. Its totient is φ = 493921978.

The previous prime is 493921943. The next prime is 493921993. The reversal of 493921979 is 979129394.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 493921979 - 2¹² = 493917883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493921979.

It is not a weakly prime, because it can be changed into another prime (493921279) 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, 246960989 + 246960990.

It is an arithmetic number, because the mean of its divisors is an integer number (246960990).

Almost surely, 2^493921979 is an apocalyptic number.

493921979 is a deficient number, since it is larger than the sum of its proper divisors (1).

493921979 is an equidigital number, since it uses as much as digits as its factorization.

493921979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The square root of 493921979 is about 22224.3555362130. The cubic root of 493921979 is about 790.4713199901.

The spelling of 493921979 in words is "four hundred ninety-three million, nine hundred twenty-one thousand, nine hundred seventy-nine".