491459953 has 4 divisors (see below), whose sum is σ = 520369380. Its totient is φ = 462550528.

The previous prime is 491459933. The next prime is 491459959. The reversal of 491459953 is 359954194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 359954194 = 2 ⋅179977097.

It can be written as a sum of positive squares in 2 ways, for example, as 235683904 + 255776049 = 15352^2 + 15993^2 .

It is a cyclic number.

It is not a de Polignac number, because 491459953 - 2²⁵ = 457905521 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491459897 and 491459906.

It is not an unprimeable number, because it can be changed into a prime (491459959) 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, 14454688 + ... + 14454721.

It is an arithmetic number, because the mean of its divisors is an integer number (130092345).

Almost surely, 2^491459953 is an apocalyptic number.

It is an amenable number.

491459953 is a deficient number, since it is larger than the sum of its proper divisors (28909427).

491459953 is a wasteful number, since it uses less digits than its factorization.

491459953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28909426.

The product of its digits is 874800, while the sum is 49.

The square root of 491459953 is about 22168.8960708466. The cubic root of 491459953 is about 789.1557251861.

The spelling of 491459953 in words is "four hundred ninety-one million, four hundred fifty-nine thousand, nine hundred fifty-three".