491711739 has 16 divisors (see below), whose sum is σ = 684380160. Its totient is φ = 313663680.

The previous prime is 491711713. The next prime is 491711743. The reversal of 491711739 is 937117194.

It is not a de Polignac number, because 491711739 - 2¹³ = 491703547 is a prime.

It is a super-3 number, since 3×491711739³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491711739.

It is not an unprimeable number, because it can be changed into a prime (491711749) 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, 21427 + ... + 37980.

It is an arithmetic number, because the mean of its divisors is an integer number (42773760).

Almost surely, 2^491711739 is an apocalyptic number.

491711739 is a deficient number, since it is larger than the sum of its proper divisors (192668421).

491711739 is a wasteful number, since it uses less digits than its factorization.

491711739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59530.

The product of its digits is 47628, while the sum is 42.

The square root of 491711739 is about 22174.5741560013. The cubic root of 491711739 is about 789.2904695936.

The spelling of 491711739 in words is "four hundred ninety-one million, seven hundred eleven thousand, seven hundred thirty-nine".