491979705 has 32 divisors (see below), whose sum is σ = 921570048. Its totient is φ = 219417600.

The previous prime is 491979667. The next prime is 491979731. The reversal of 491979705 is 507979194.

It is a happy number.

It is not a de Polignac number, because 491979705 - 2¹⁰ = 491978681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52836 + ... + 61445.

It is an arithmetic number, because the mean of its divisors is an integer number (28799064).

Almost surely, 2^491979705 is an apocalyptic number.

It is an amenable number.

491979705 is a deficient number, since it is larger than the sum of its proper divisors (429590343).

491979705 is a wasteful number, since it uses less digits than its factorization.

491979705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114337.

The product of its (nonzero) digits is 714420, while the sum is 51.

The square root of 491979705 is about 22180.6155234700. The cubic root of 491979705 is about 789.4338222832.

The spelling of 491979705 in words is "four hundred ninety-one million, nine hundred seventy-nine thousand, seven hundred five".