491388141 has 8 divisors (see below), whose sum is σ = 656589024. Its totient is φ = 326889680.

The previous prime is 491388097. The next prime is 491388181. The reversal of 491388141 is 141883194.

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

It is a cyclic number.

It is not a de Polignac number, because 491388141 - 2¹⁵ = 491355373 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 491388141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491388181) 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, 173970 + ... + 176771.

It is an arithmetic number, because the mean of its divisors is an integer number (82073628).

Almost surely, 2^491388141 is an apocalyptic number.

It is an amenable number.

491388141 is a deficient number, since it is larger than the sum of its proper divisors (165200883).

491388141 is a wasteful number, since it uses less digits than its factorization.

491388141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351211.

The product of its digits is 27648, while the sum is 39.

The square root of 491388141 is about 22167.2763550239. The cubic root of 491388141 is about 789.1172862376.

The spelling of 491388141 in words is "four hundred ninety-one million, three hundred eighty-eight thousand, one hundred forty-one".