491426785 has 8 divisors (see below), whose sum is σ = 605650536. Its totient is φ = 382515840.

The previous prime is 491426777. The next prime is 491426851. The reversal of 491426785 is 587624194.

It can be written as a sum of positive squares in 4 ways, for example, as 175191696 + 316235089 = 13236^2 + 17783^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491426785 - 2³ = 491426777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1327996 + ... + 1328365.

It is an arithmetic number, because the mean of its divisors is an integer number (75706317).

Almost surely, 2^491426785 is an apocalyptic number.

It is an amenable number.

491426785 is a deficient number, since it is larger than the sum of its proper divisors (114223751).

491426785 is a wasteful number, since it uses less digits than its factorization.

491426785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656403.

The product of its digits is 483840, while the sum is 46.

The square root of 491426785 is about 22168.1479830860. The cubic root of 491426785 is about 789.1379717518.

The spelling of 491426785 in words is "four hundred ninety-one million, four hundred twenty-six thousand, seven hundred eighty-five".