489791965 has 16 divisors (see below), whose sum is σ = 638886528. Its totient is φ = 358307136.

The previous prime is 489791959. The next prime is 489791987. The reversal of 489791965 is 569197984.

It is a cyclic number.

It is not a de Polignac number, because 489791965 - 2¹⁷ = 489660893 is a prime.

It is a super-2 number, since 2×489791965² = 479792337957122450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28257 + ... + 42166.

It is an arithmetic number, because the mean of its divisors is an integer number (39930408).

Almost surely, 2^489791965 is an apocalyptic number.

It is an amenable number.

489791965 is a deficient number, since it is larger than the sum of its proper divisors (149094563).

489791965 is a wasteful number, since it uses less digits than its factorization.

489791965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70548.

The product of its digits is 4898880, while the sum is 58.

The square root of 489791965 is about 22131.2440906516. The cubic root of 489791965 is about 788.2619295754.

It can be divided in two parts, 4897919 and 65, that added together give a palindrome (4897984).

The spelling of 489791965 in words is "four hundred eighty-nine million, seven hundred ninety-one thousand, nine hundred sixty-five".