495823721 has 4 divisors (see below), whose sum is σ = 496953600. Its totient is φ = 494693844.

The previous prime is 495823711. The next prime is 495823723. The reversal of 495823721 is 127328594.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495823721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495823723) 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 3 ways as a sum of consecutive naturals, for example, 564281 + ... + 565158.

It is an arithmetic number, because the mean of its divisors is an integer number (124238400).

Almost surely, 2^495823721 is an apocalyptic number.

It is an amenable number.

495823721 is a deficient number, since it is larger than the sum of its proper divisors (1129879).

495823721 is a wasteful number, since it uses less digits than its factorization.

495823721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129878.

The product of its digits is 120960, while the sum is 41.

The square root of 495823721 is about 22267.0995192459. The cubic root of 495823721 is about 791.4845348601.

The spelling of 495823721 in words is "four hundred ninety-five million, eight hundred twenty-three thousand, seven hundred twenty-one".