499993881 has 8 divisors (see below), whose sum is σ = 677587584. Its totient is φ = 327864720.

The previous prime is 499993867. The next prime is 499993883. The reversal of 499993881 is 188399994.

It is a happy number.

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

It is not a de Polignac number, because 499993881 - 2⁹ = 499993369 is a prime.

It is a super-2 number, since 2×499993881² = 499987762074884322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (499993883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365921 + ... + 1366286.

It is an arithmetic number, because the mean of its divisors is an integer number (84698448).

Almost surely, 2^499993881 is an apocalyptic number.

It is an amenable number.

499993881 is a deficient number, since it is larger than the sum of its proper divisors (177593703).

499993881 is a wasteful number, since it uses less digits than its factorization.

499993881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732271.

The product of its digits is 5038848, while the sum is 60.

The square root of 499993881 is about 22360.5429495797. The cubic root of 499993881 is about 793.6972882019.

The spelling of 499993881 in words is "four hundred ninety-nine million, nine hundred ninety-three thousand, eight hundred eighty-one".