499993641 has 24 divisors (see below), whose sum is σ = 855959104. Its totient is φ = 285709680.

The previous prime is 499993631. The next prime is 499993709. The reversal of 499993641 is 146399994.

499993641 is a `hidden beast` number, since 499 + 9 + 93 + 64 + 1 = 666.

It is not a de Polignac number, because 499993641 - 2⁹ = 499993129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (499993601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145270 + ... + 148671.

Almost surely, 2^499993641 is an apocalyptic number.

It is an amenable number.

499993641 is a deficient number, since it is larger than the sum of its proper divisors (355965463).

499993641 is an equidigital number, since it uses as much as digits as its factorization.

499993641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293963 (or 293951 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 499993641 is about 22360.5375829831. The cubic root of 499993641 is about 793.6971612087.

The spelling of 499993641 in words is "four hundred ninety-nine million, nine hundred ninety-three thousand, six hundred forty-one".