491611447 has 8 divisors (see below), whose sum is σ = 496314000. Its totient is φ = 486925824.

The previous prime is 491611441. The next prime is 491611487. The reversal of 491611447 is 744116194.

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 491611447 - 2⁷ = 491611319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491611441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58473 + ... + 66349.

It is an arithmetic number, because the mean of its divisors is an integer number (62039250).

Almost surely, 2^491611447 is an apocalyptic number.

491611447 is a deficient number, since it is larger than the sum of its proper divisors (4702553).

491611447 is a wasteful number, since it uses less digits than its factorization.

491611447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465.

The product of its digits is 24192, while the sum is 37.

The square root of 491611447 is about 22172.3126218263. The cubic root of 491611447 is about 789.2368033931.

The spelling of 491611447 in words is "four hundred ninety-one million, six hundred eleven thousand, four hundred forty-seven".