491097599 has 8 divisors (see below), whose sum is σ = 494194560. Its totient is φ = 488009376.

The previous prime is 491097589. The next prime is 491097611. The reversal of 491097599 is 995790194.

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 491097599 - 2¹² = 491093503 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 491097599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491097589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137237 + ... + 140769.

It is an arithmetic number, because the mean of its divisors is an integer number (61774320).

Almost surely, 2^491097599 is an apocalyptic number.

491097599 is a deficient number, since it is larger than the sum of its proper divisors (3096961).

491097599 is a wasteful number, since it uses less digits than its factorization.

491097599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369.

The product of its (nonzero) digits is 918540, while the sum is 53.

The square root of 491097599 is about 22160.7219873361. The cubic root of 491097599 is about 788.9617290197.

The spelling of 491097599 in words is "four hundred ninety-one million, ninety-seven thousand, five hundred ninety-nine".