495908721 has 48 divisors (see below), whose sum is σ = 940093440. Its totient is φ = 244049760.

The previous prime is 495908719. The next prime is 495908731. The reversal of 495908721 is 127809594.

495908721 is a `hidden beast` number, since 495 + 90 + 8 + 72 + 1 = 666.

It is not a de Polignac number, because 495908721 - 2¹ = 495908719 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (495908731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5665 + ... + 31998.

It is an arithmetic number, because the mean of its divisors is an integer number (19585280).

Almost surely, 2^495908721 is an apocalyptic number.

It is an amenable number.

495908721 is a deficient number, since it is larger than the sum of its proper divisors (444184719).

495908721 is a wasteful number, since it uses less digits than its factorization.

495908721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37706 (or 37703 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 495908721 is about 22269.0080829838. The cubic root of 495908721 is about 791.5297608404.

It can be divided in two parts, 49590 and 8721, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 495908721 in words is "four hundred ninety-five million, nine hundred eight thousand, seven hundred twenty-one".