489806281 has 4 divisors (see below), whose sum is σ = 490361872. Its totient is φ = 489250692.

The previous prime is 489806257. The next prime is 489806287. The reversal of 489806281 is 182608984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 489806281 - 2¹⁷ = 489675209 is a prime.

It is a super-2 number, since 2×489806281² = 479820385814101922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489806287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276471 + ... + 278236.

It is an arithmetic number, because the mean of its divisors is an integer number (122590468).

Almost surely, 2^489806281 is an apocalyptic number.

It is an amenable number.

489806281 is a deficient number, since it is larger than the sum of its proper divisors (555591).

489806281 is an equidigital number, since it uses as much as digits as its factorization.

489806281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555590.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 489806281 is about 22131.5675224327. The cubic root of 489806281 is about 788.2696094672.

The spelling of 489806281 in words is "four hundred eighty-nine million, eight hundred six thousand, two hundred eighty-one".