491121095 has 16 divisors (see below), whose sum is σ = 603279360. Its totient is φ = 383646624.

The previous prime is 491121079. The next prime is 491121173. The reversal of 491121095 is 590121194.

It is a cyclic number.

It is not a de Polignac number, because 491121095 - 2⁴ = 491121079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110384 + ... + 114746.

It is an arithmetic number, because the mean of its divisors is an integer number (37704960).

Almost surely, 2^491121095 is an apocalyptic number.

491121095 is a deficient number, since it is larger than the sum of its proper divisors (112158265).

491121095 is a wasteful number, since it uses less digits than its factorization.

491121095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 491121095 is about 22161.2521081278. The cubic root of 491121095 is about 788.9743111413.

Subtracting 491121095 from its reverse (590121194), we obtain a palindrome (99000099).

The spelling of 491121095 in words is "four hundred ninety-one million, one hundred twenty-one thousand, ninety-five".