491496609 has 8 divisors (see below), whose sum is σ = 666436320. Its totient is φ = 322110656.

The previous prime is 491496557. The next prime is 491496619. The reversal of 491496609 is 906694194.

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

It is a cyclic number.

It is not a de Polignac number, because 491496609 - 2⁹ = 491496097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491496619) 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, 1388232 + ... + 1388585.

It is an arithmetic number, because the mean of its divisors is an integer number (83304540).

Almost surely, 2^491496609 is an apocalyptic number.

It is an amenable number.

491496609 is a deficient number, since it is larger than the sum of its proper divisors (174939711).

491496609 is a wasteful number, since it uses less digits than its factorization.

491496609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776879.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 491496609 is about 22169.7227993496. The cubic root of 491496609 is about 789.1753446708.

The spelling of 491496609 in words is "four hundred ninety-one million, four hundred ninety-six thousand, six hundred nine".