491379519 has 8 divisors (see below), whose sum is σ = 659512192. Its totient is φ = 325416600.

The previous prime is 491379517. The next prime is 491379529. The reversal of 491379519 is 915973194.

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

It is not a de Polignac number, because 491379519 - 2¹ = 491379517 is a prime.

It is a super-2 number, since 2×491379519² = 482907663385342722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491379517) 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, 541909 + ... + 542814.

It is an arithmetic number, because the mean of its divisors is an integer number (82439024).

Almost surely, 2^491379519 is an apocalyptic number.

491379519 is a deficient number, since it is larger than the sum of its proper divisors (168132673).

491379519 is a wasteful number, since it uses less digits than its factorization.

491379519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084877.

The product of its digits is 306180, while the sum is 48.

The square root of 491379519 is about 22167.0818783168. The cubic root of 491379519 is about 789.1126708712.

The spelling of 491379519 in words is "four hundred ninety-one million, three hundred seventy-nine thousand, five hundred nineteen".