491903705 has 4 divisors (see below), whose sum is σ = 590284452. Its totient is φ = 393522960.

The previous prime is 491903693. The next prime is 491903723. The reversal of 491903705 is 507309194.

It is a happy number.

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 164583241 + 327320464 = 12829^2 + 18092^2 .

It is not a de Polignac number, because 491903705 - 2¹² = 491899609 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 49190366 + ... + 49190375.

It is an arithmetic number, because the mean of its divisors is an integer number (147571113).

Almost surely, 2^491903705 is an apocalyptic number.

It is an amenable number.

491903705 is a deficient number, since it is larger than the sum of its proper divisors (98380747).

491903705 is an equidigital number, since it uses as much as digits as its factorization.

491903705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98380746.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 491903705 is about 22178.9022496606. The cubic root of 491903705 is about 789.3931701591.

The spelling of 491903705 in words is "four hundred ninety-one million, nine hundred three thousand, seven hundred five".