491345239 has 16 divisors (see below), whose sum is σ = 613115136. Its totient is φ = 382536000.

The previous prime is 491345227. The next prime is 491345243. The reversal of 491345239 is 932543194.

It is not a de Polignac number, because 491345239 - 2¹³ = 491337047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491346239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125664 + ... + 129514.

It is an arithmetic number, because the mean of its divisors is an integer number (38319696).

Almost surely, 2^491345239 is an apocalyptic number.

491345239 is a deficient number, since it is larger than the sum of its proper divisors (121769897).

491345239 is a wasteful number, since it uses less digits than its factorization.

491345239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526.

The product of its digits is 116640, while the sum is 40.

The square root of 491345239 is about 22166.3086462316. The cubic root of 491345239 is about 789.0943202139.

The spelling of 491345239 in words is "four hundred ninety-one million, three hundred forty-five thousand, two hundred thirty-nine".