491350005 has 12 divisors (see below), whose sum is σ = 851673420. Its totient is φ = 262053312.

The previous prime is 491349979. The next prime is 491350019. The reversal of 491350005 is 500053194.

It can be written as a sum of positive squares in 2 ways, for example, as 105698961 + 385651044 = 10281^2 + 19638^2 .

It is not a de Polignac number, because 491350005 - 2⁶ = 491349941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5459400 + ... + 5459489.

It is an arithmetic number, because the mean of its divisors is an integer number (70972785).

Almost surely, 2^491350005 is an apocalyptic number.

491350005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491350005 is a deficient number, since it is larger than the sum of its proper divisors (360323415).

491350005 is a wasteful number, since it uses less digits than its factorization.

491350005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10918900 (or 10918897 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 491350005 is about 22166.4161514666. The cubic root of 491350005 is about 789.0968715845.

The spelling of 491350005 in words is "four hundred ninety-one million, three hundred fifty thousand, five".