489691679 has 2 divisors, whose sum is σ = 489691680. Its totient is φ = 489691678.

The previous prime is 489691669. The next prime is 489691687. The reversal of 489691679 is 976196984.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489691679 - 2⁴ = 489691663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489691639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244845839 + 244845840.

It is an arithmetic number, because the mean of its divisors is an integer number (244845840).

Almost surely, 2^489691679 is an apocalyptic number.

489691679 is a deficient number, since it is larger than the sum of its proper divisors (1).

489691679 is an equidigital number, since it uses as much as digits as its factorization.

489691679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 489691679 is about 22128.9782638060. The cubic root of 489691679 is about 788.2081264389.

The spelling of 489691679 in words is "four hundred eighty-nine million, six hundred ninety-one thousand, six hundred seventy-nine".