497925721 has 12 divisors (see below), whose sum is σ = 509238292. Its totient is φ = 486854784.

The previous prime is 497925713. The next prime is 497925763. The reversal of 497925721 is 127529794.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 176225625 + 321700096 = 13275^2 + 17936^2 .

It is not a de Polignac number, because 497925721 - 2³ = 497925713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497925821) 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 11 ways as a sum of consecutive naturals, for example, 1089325 + ... + 1089781.

Almost surely, 2^497925721 is an apocalyptic number.

It is an amenable number.

497925721 is a deficient number, since it is larger than the sum of its proper divisors (11312571).

497925721 is an equidigital number, since it uses as much as digits as its factorization.

497925721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 829 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 497925721 is about 22314.2492815689. The cubic root of 497925721 is about 792.6014338086.

The spelling of 497925721 in words is "four hundred ninety-seven million, nine hundred twenty-five thousand, seven hundred twenty-one".