491931419 has 4 divisors (see below), whose sum is σ = 562207344. Its totient is φ = 421655496.

The previous prime is 491931373. The next prime is 491931443. The reversal of 491931419 is 914139194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 914139194 = 2 ⋅457069597.

It is a cyclic number.

It is not a de Polignac number, because 491931419 - 2⁸ = 491931163 is a prime.

It is a super-2 number, since 2×491931419² = 483993041998707122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491931119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35137952 + ... + 35137965.

It is an arithmetic number, because the mean of its divisors is an integer number (140551836).

Almost surely, 2^491931419 is an apocalyptic number.

491931419 is a deficient number, since it is larger than the sum of its proper divisors (70275925).

491931419 is an equidigital number, since it uses as much as digits as its factorization.

491931419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70275924.

The product of its digits is 34992, while the sum is 41.

The square root of 491931419 is about 22179.5270238118. The cubic root of 491931419 is about 789.4079947621.

The spelling of 491931419 in words is "four hundred ninety-one million, nine hundred thirty-one thousand, four hundred nineteen".