491819199 has 8 divisors (see below), whose sum is σ = 690272640. Its totient is φ = 310622616.

The previous prime is 491819137. The next prime is 491819249. The reversal of 491819199 is 991918194.

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

It is not a de Polignac number, because 491819199 - 2⁷ = 491819071 is a prime.

It is a super-2 number, since 2×491819199² = 483772249010003202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491819599) 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, 4314147 + ... + 4314260.

It is an arithmetic number, because the mean of its divisors is an integer number (86284080).

Almost surely, 2^491819199 is an apocalyptic number.

491819199 is a deficient number, since it is larger than the sum of its proper divisors (198453441).

491819199 is a wasteful number, since it uses less digits than its factorization.

491819199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8628429.

The product of its digits is 209952, while the sum is 51.

The square root of 491819199 is about 22176.9970690353. The cubic root of 491819199 is about 789.3479632897.

The spelling of 491819199 in words is "four hundred ninety-one million, eight hundred nineteen thousand, one hundred ninety-nine".