499794561 has 60 divisors (see below), whose sum is σ = 854248980. Its totient is φ = 281534400.

The previous prime is 499794517. The next prime is 499794571. The reversal of 499794561 is 165497994.

It is a happy number.

499794561 is a `hidden beast` number, since 4 + 9 + 9 + 79 + 4 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 473323536 + 26471025 = 21756^2 + 5145^2 .

It is not a de Polignac number, because 499794561 - 2⁷ = 499794433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 499794498 and 499794507.

It is not an unprimeable number, because it can be changed into a prime (499794571) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2182395 + ... + 2182623.

It is an arithmetic number, because the mean of its divisors is an integer number (14237483).

Almost surely, 2^499794561 is an apocalyptic number.

It is an amenable number.

499794561 is a deficient number, since it is larger than the sum of its proper divisors (354454419).

499794561 is a wasteful number, since it uses less digits than its factorization.

499794561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 340 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 499794561 is about 22356.0855473403. The cubic root of 499794561 is about 793.5918063977.

The spelling of 499794561 in words is "four hundred ninety-nine million, seven hundred ninety-four thousand, five hundred sixty-one".