489243961 has 4 divisors (see below), whose sum is σ = 491147892. Its totient is φ = 487340032.

The previous prime is 489243941. The next prime is 489244043. The reversal of 489243961 is 169342984.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 422919225 + 66324736 = 20565^2 + 8144^2 .

It is a cyclic number.

It is not a de Polignac number, because 489243961 - 2²⁵ = 455689529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489243941) 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, 951580 + ... + 952093.

It is an arithmetic number, because the mean of its divisors is an integer number (122786973).

Almost surely, 2^489243961 is an apocalyptic number.

It is an amenable number.

489243961 is a deficient number, since it is larger than the sum of its proper divisors (1903931).

489243961 is a wasteful number, since it uses less digits than its factorization.

489243961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903930.

The product of its digits is 373248, while the sum is 46.

The square root of 489243961 is about 22118.8598485546. The cubic root of 489243961 is about 787.9678374403.

The spelling of 489243961 in words is "four hundred eighty-nine million, two hundred forty-three thousand, nine hundred sixty-one".