489994989 has 16 divisors (see below), whose sum is σ = 713365824. Its totient is φ = 296697600.

The previous prime is 489994987. The next prime is 489994997. The reversal of 489994989 is 989499984.

It is a happy number.

It is not a de Polignac number, because 489994989 - 2¹ = 489994987 is a prime.

It is a super-2 number, since 2×489994989² = 480190178490220242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489994987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33909 + ... + 46149.

It is an arithmetic number, because the mean of its divisors is an integer number (44585364).

Almost surely, 2^489994989 is an apocalyptic number.

It is an amenable number.

489994989 is a deficient number, since it is larger than the sum of its proper divisors (223370835).

489994989 is a wasteful number, since it uses less digits than its factorization.

489994989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13468.

The product of its digits is 60466176, while the sum is 69.

The square root of 489994989 is about 22135.8304339367. The cubic root of 489994989 is about 788.3708288594.

The spelling of 489994989 in words is "four hundred eighty-nine million, nine hundred ninety-four thousand, nine hundred eighty-nine".