489990679 has 2 divisors, whose sum is σ = 489990680. Its totient is φ = 489990678.

The previous prime is 489990661. The next prime is 489990691. The reversal of 489990679 is 976099984.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489990679 - 2⁵ = 489990647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489990629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244995339 + 244995340.

It is an arithmetic number, because the mean of its divisors is an integer number (244995340).

Almost surely, 2^489990679 is an apocalyptic number.

489990679 is a deficient number, since it is larger than the sum of its proper divisors (1).

489990679 is an equidigital number, since it uses as much as digits as its factorization.

489990679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The square root of 489990679 is about 22135.7330802483. The cubic root of 489990679 is about 788.3685173472.

The spelling of 489990679 in words is "four hundred eighty-nine million, nine hundred ninety thousand, six hundred seventy-nine".