491706953 has 4 divisors (see below), whose sum is σ = 494423748. Its totient is φ = 488990160.

The previous prime is 491706937. The next prime is 491706959. The reversal of 491706953 is 359607194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 229007689 + 262699264 = 15133^2 + 16208^2 .

It is a cyclic number.

It is not a de Polignac number, because 491706953 - 2⁴ = 491706937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491706959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358126 + ... + 1358487.

It is an arithmetic number, because the mean of its divisors is an integer number (123605937).

Almost surely, 2^491706953 is an apocalyptic number.

It is an amenable number.

491706953 is a deficient number, since it is larger than the sum of its proper divisors (2716795).

491706953 is a wasteful number, since it uses less digits than its factorization.

491706953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716794.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 491706953 is about 22174.4662393484. The cubic root of 491706953 is about 789.2879087731.

The spelling of 491706953 in words is "four hundred ninety-one million, seven hundred six thousand, nine hundred fifty-three".