497918421 has 192 divisors, whose sum is σ = 1056706560. Its totient is φ = 225815040.

The previous prime is 497918419. The next prime is 497918441. The reversal of 497918421 is 124819794.

It is a happy number.

It is not a de Polignac number, because 497918421 - 2¹ = 497918419 is a prime.

It is a super-2 number, since 2×497918421² = 495845507942266482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497918441) 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 191 ways as a sum of consecutive naturals, for example, 5594545 + ... + 5594633.

It is an arithmetic number, because the mean of its divisors is an integer number (5503680).

Almost surely, 2^497918421 is an apocalyptic number.

It is an amenable number.

497918421 is an abundant number, since it is smaller than the sum of its proper divisors (558788139).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

497918421 is a wasteful number, since it uses less digits than its factorization.

497918421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 146 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 497918421 is about 22314.0857083592. The cubic root of 497918421 is about 792.5975603937.

The spelling of 497918421 in words is "four hundred ninety-seven million, nine hundred eighteen thousand, four hundred twenty-one".