491155339 has 8 divisors (see below), whose sum is σ = 534834000. Its totient is φ = 449259552.

The previous prime is 491155337. The next prime is 491155361. The reversal of 491155339 is 933551194.

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 491155339 - 2¹ = 491155337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491155333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445144 + ... + 446245.

It is an arithmetic number, because the mean of its divisors is an integer number (66854250).

Almost surely, 2^491155339 is an apocalyptic number.

491155339 is a deficient number, since it is larger than the sum of its proper divisors (43678661).

491155339 is a wasteful number, since it uses less digits than its factorization.

491155339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891437.

The product of its digits is 72900, while the sum is 40.

The square root of 491155339 is about 22162.0247044353. The cubic root of 491155339 is about 788.9926481045.

The spelling of 491155339 in words is "four hundred ninety-one million, one hundred fifty-five thousand, three hundred thirty-nine".