491700819 has 8 divisors (see below), whose sum is σ = 663900160. Its totient is φ = 323651016.

The previous prime is 491700817. The next prime is 491700821. The reversal of 491700819 is 918007194.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (491700817) and next prime (491700821).

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

It is not a de Polignac number, because 491700819 - 2¹ = 491700817 is a prime.

It is a super-2 number, since 2×491700819² = 483539390810541522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491700817) 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, 1037107 + ... + 1037580.

It is an arithmetic number, because the mean of its divisors is an integer number (82987520).

Almost surely, 2^491700819 is an apocalyptic number.

491700819 is a deficient number, since it is larger than the sum of its proper divisors (172199341).

491700819 is a wasteful number, since it uses less digits than its factorization.

491700819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074769.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 491700819 is about 22174.3279266813. The cubic root of 491700819 is about 789.2846266609.

The spelling of 491700819 in words is "four hundred ninety-one million, seven hundred thousand, eight hundred nineteen".