495909909 has 18 divisors (see below), whose sum is σ = 787355478. Its totient is φ = 300550800.

The previous prime is 495909901. The next prime is 495909913. The reversal of 495909909 is 909909594.

It is a happy number.

495909909 is a `hidden beast` number, since 49 + 590 + 9 + 9 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 329422500 + 166487409 = 18150^2 + 12903^2 .

It is not a de Polignac number, because 495909909 - 2³ = 495909901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495909901) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 226602 + ... + 228779.

It is an arithmetic number, because the mean of its divisors is an integer number (43741971).

Almost surely, 2^495909909 is an apocalyptic number.

It is an amenable number.

495909909 is a deficient number, since it is larger than the sum of its proper divisors (291445569).

495909909 is a wasteful number, since it uses less digits than its factorization.

495909909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455409 (or 455395 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 495909909 is about 22269.0347568097. The cubic root of 495909909 is about 791.5303929033.

The spelling of 495909909 in words is "four hundred ninety-five million, nine hundred nine thousand, nine hundred nine".