491667699 has 8 divisors (see below), whose sum is σ = 658445760. Its totient is φ = 326334056.

The previous prime is 491667691. The next prime is 491667707. The reversal of 491667699 is 996766194.

It is an interprime number because it is at equal distance from previous prime (491667691) and next prime (491667707).

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 491667699 - 2³ = 491667691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491667691) 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, 360309 + ... + 361670.

It is an arithmetic number, because the mean of its divisors is an integer number (82305720).

Almost surely, 2^491667699 is an apocalyptic number.

491667699 is a deficient number, since it is larger than the sum of its proper divisors (166778061).

491667699 is a wasteful number, since it uses less digits than its factorization.

491667699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722209.

The product of its digits is 4408992, while the sum is 57.

The square root of 491667699 is about 22173.5811045487. The cubic root of 491667699 is about 789.2669047097.

It can be divided in two parts, 49166 and 7699, that added together give a palindrome (56865).

The spelling of 491667699 in words is "four hundred ninety-one million, six hundred sixty-seven thousand, six hundred ninety-nine".