489709081 has 8 divisors (see below), whose sum is σ = 497712384. Its totient is φ = 481736640.

The previous prime is 489709067. The next prime is 489709111. The reversal of 489709081 is 180907984.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 489709081 - 2⁵ = 489709049 is a prime.

It is a super-2 number, since 2×489709081² = 479629968027729122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489709001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25425 + ... + 40321.

It is an arithmetic number, because the mean of its divisors is an integer number (62214048).

Almost surely, 2^489709081 is an apocalyptic number.

It is an amenable number.

489709081 is a deficient number, since it is larger than the sum of its proper divisors (8003303).

489709081 is a wasteful number, since it uses less digits than its factorization.

489709081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15431.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 489709081 is about 22129.3714551498. The cubic root of 489709081 is about 788.2174630861.

The spelling of 489709081 in words is "four hundred eighty-nine million, seven hundred nine thousand, eighty-one".