497890821 has 16 divisors (see below), whose sum is σ = 716607360. Its totient is φ = 306546240.

The previous prime is 497890819. The next prime is 497890843. The reversal of 497890821 is 128098794.

It is not a de Polignac number, because 497890821 - 2¹ = 497890819 is a prime.

It is a super-3 number, since 3×497890821³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497890121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122410 + ... + 126411.

It is an arithmetic number, because the mean of its divisors is an integer number (44787960).

Almost surely, 2^497890821 is an apocalyptic number.

It is an amenable number.

497890821 is a deficient number, since it is larger than the sum of its proper divisors (218716539).

497890821 is a wasteful number, since it uses less digits than its factorization.

497890821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248876.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 497890821 is about 22313.4672563454. The cubic root of 497890821 is about 792.5829153595.

The spelling of 497890821 in words is "four hundred ninety-seven million, eight hundred ninety thousand, eight hundred twenty-one".