489997081 has 8 divisors (see below), whose sum is σ = 560153024. Its totient is φ = 419880240.

The previous prime is 489997073. The next prime is 489997087. The reversal of 489997081 is 180799984.

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 489997081 - 2³ = 489997073 is a prime.

It is a super-2 number, since 2×489997081² = 480194278777041122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489997087) 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, 25651 + ... + 40471.

It is an arithmetic number, because the mean of its divisors is an integer number (70019128).

Almost surely, 2^489997081 is an apocalyptic number.

It is an amenable number.

489997081 is a deficient number, since it is larger than the sum of its proper divisors (70155943).

489997081 is a wasteful number, since it uses less digits than its factorization.

489997081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19551.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 489997081 is about 22135.8776875912. The cubic root of 489997081 is about 788.3719508229.

The spelling of 489997081 in words is "four hundred eighty-nine million, nine hundred ninety-seven thousand, eighty-one".