489697729 has 2 divisors, whose sum is σ = 489697730. Its totient is φ = 489697728.

The previous prime is 489697693. The next prime is 489697739. The reversal of 489697729 is 927796984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292239025 + 197458704 = 17095^2 + 14052^2 .

It is a cyclic number.

It is not a de Polignac number, because 489697729 - 2⁹ = 489697217 is a prime.

It is not a weakly prime, because it can be changed into another prime (489697739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244848864 + 244848865.

It is an arithmetic number, because the mean of its divisors is an integer number (244848865).

Almost surely, 2^489697729 is an apocalyptic number.

It is an amenable number.

489697729 is a deficient number, since it is larger than the sum of its proper divisors (1).

489697729 is an equidigital number, since it uses as much as digits as its factorization.

489697729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 61.

The square root of 489697729 is about 22129.1149619681. The cubic root of 489697729 is about 788.2113724539.

The spelling of 489697729 in words is "four hundred eighty-nine million, six hundred ninety-seven thousand, seven hundred twenty-nine".