497631985 has 8 divisors (see below), whose sum is σ = 597568896. Its totient is φ = 397831920.

The previous prime is 497631941. The next prime is 497631997. The reversal of 497631985 is 589136794.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-497631985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26031 + ... + 40900.

It is an arithmetic number, because the mean of its divisors is an integer number (74696112).

Almost surely, 2^497631985 is an apocalyptic number.

It is an amenable number.

497631985 is a deficient number, since it is larger than the sum of its proper divisors (99936911).

497631985 is a wasteful number, since it uses less digits than its factorization.

497631985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68423.

The product of its digits is 1632960, while the sum is 52.

The square root of 497631985 is about 22307.6665072795. Note that the first 3 decimals coincide. The cubic root of 497631985 is about 792.4455461860.

The spelling of 497631985 in words is "four hundred ninety-seven million, six hundred thirty-one thousand, nine hundred eighty-five".