491000133 has 16 divisors (see below), whose sum is σ = 722223936. Its totient is φ = 294783360.

The previous prime is 491000119. The next prime is 491000177. The reversal of 491000133 is 331000194.

It is not a de Polignac number, because 491000133 - 2⁸ = 490999877 is a prime.

It is a super-2 number, since 2×491000133² = 482162261212035378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491000833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151935 + ... + 155132.

It is an arithmetic number, because the mean of its divisors is an integer number (45138996).

Almost surely, 2^491000133 is an apocalyptic number.

It is an amenable number.

491000133 is a deficient number, since it is larger than the sum of its proper divisors (231223803).

491000133 is a wasteful number, since it uses less digits than its factorization.

491000133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307124.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 491000133 is about 22158.5228072631. The cubic root of 491000133 is about 788.9095316345.

The spelling of 491000133 in words is "four hundred ninety-one million, one hundred thirty-three", and thus it is an aban number.