491264249 has 12 divisors (see below), whose sum is σ = 605087604. Its totient is φ = 396313344.

The previous prime is 491264239. The next prime is 491264251. The reversal of 491264249 is 942462194.

It can be written as a sum of positive squares in 2 ways, for example, as 290532025 + 200732224 = 17045^2 + 14168^2 .

It is not a de Polignac number, because 491264249 - 2¹⁶ = 491198713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491264239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294044 + ... + 295709.

It is an arithmetic number, because the mean of its divisors is an integer number (50423967).

Almost surely, 2^491264249 is an apocalyptic number.

491264249 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

491264249 is a deficient number, since it is larger than the sum of its proper divisors (113823355).

491264249 is a wasteful number, since it uses less digits than its factorization.

491264249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589784 (or 589777 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 491264249 is about 22164.4816993315. The cubic root of 491264249 is about 789.0509615218.

The spelling of 491264249 in words is "four hundred ninety-one million, two hundred sixty-four thousand, two hundred forty-nine".