489507749 has 8 divisors (see below), whose sum is σ = 492286200. Its totient is φ = 486737856.

The previous prime is 489507721. The next prime is 489507757. The reversal of 489507749 is 947705984.

It can be written as a sum of positive squares in 4 ways, for example, as 238918849 + 250588900 = 15457^2 + 15830^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489507749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 489507749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489507049) 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, 136787 + ... + 140319.

It is an arithmetic number, because the mean of its divisors is an integer number (61535775).

Almost surely, 2^489507749 is an apocalyptic number.

It is an amenable number.

489507749 is a deficient number, since it is larger than the sum of its proper divisors (2778451).

489507749 is a wasteful number, since it uses less digits than its factorization.

489507749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 489507749 is about 22124.8220105835. The cubic root of 489507749 is about 788.1094294549.

The spelling of 489507749 in words is "four hundred eighty-nine million, five hundred seven thousand, seven hundred forty-nine".