495491905 has 4 divisors (see below), whose sum is σ = 594590292. Its totient is φ = 396393520.

The previous prime is 495491849. The next prime is 495491957. The reversal of 495491905 is 509194594.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509194594 = 2 ⋅254597297.

It can be written as a sum of positive squares in 2 ways, for example, as 268206129 + 227285776 = 16377^2 + 15076^2 .

It is not a de Polignac number, because 495491905 - 2⁹ = 495491393 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49549186 + ... + 49549195.

It is an arithmetic number, because the mean of its divisors is an integer number (148647573).

Almost surely, 2^495491905 is an apocalyptic number.

It is an amenable number.

495491905 is a deficient number, since it is larger than the sum of its proper divisors (99098387).

495491905 is an equidigital number, since it uses as much as digits as its factorization.

495491905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99098386.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 495491905 is about 22259.6474590232. The cubic root of 495491905 is about 791.3079359142.

The spelling of 495491905 in words is "four hundred ninety-five million, four hundred ninety-one thousand, nine hundred five".