491394141 has 32 divisors (see below), whose sum is σ = 842547200. Its totient is φ = 277233840.

The previous prime is 491394139. The next prime is 491394161. The reversal of 491394141 is 141493194.

It is not a de Polignac number, because 491394141 - 2¹ = 491394139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491394096 and 491394105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491394161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1525 + ... + 31386.

It is an arithmetic number, because the mean of its divisors is an integer number (26329600).

Almost surely, 2^491394141 is an apocalyptic number.

It is an amenable number.

491394141 is a deficient number, since it is larger than the sum of its proper divisors (351153059).

491394141 is a wasteful number, since it uses less digits than its factorization.

491394141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33006 (or 33000 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 491394141 is about 22167.4116892343. The cubic root of 491394141 is about 789.1204980126.

The spelling of 491394141 in words is "four hundred ninety-one million, three hundred ninety-four thousand, one hundred forty-one".