499268781 has 24 divisors (see below), whose sum is σ = 788033376. Its totient is φ = 302084640.

The previous prime is 499268779. The next prime is 499268789. The reversal of 499268781 is 187862994.

It is not a de Polignac number, because 499268781 - 2¹ = 499268779 is a prime.

It is a super-2 number, since 2×499268781² = 498538631362451922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499268789) 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, 60786 + ... + 68508.

It is an arithmetic number, because the mean of its divisors is an integer number (32834724).

Almost surely, 2^499268781 is an apocalyptic number.

It is an amenable number.

499268781 is a deficient number, since it is larger than the sum of its proper divisors (288764595).

499268781 is a wasteful number, since it uses less digits than its factorization.

499268781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393 (or 8390 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 499268781 is about 22344.3232388005. The cubic root of 499268781 is about 793.3134246155.

The spelling of 499268781 in words is "four hundred ninety-nine million, two hundred sixty-eight thousand, seven hundred eighty-one".