413686781 has 4 divisors (see below), whose sum is σ = 413747964. Its totient is φ = 413625600.

The previous prime is 413686733. The next prime is 413686837. The reversal of 413686781 is 187686314.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 175138756 + 238548025 = 13234^2 + 15445^2 .

It is a cyclic number.

It is not a de Polignac number, because 413686781 - 2¹⁸ = 413424637 is a prime.

It is a super-2 number, since 2×413686781² = 342273505548283922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (413686181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18980 + ... + 34461.

It is an arithmetic number, because the mean of its divisors is an integer number (103436991).

Almost surely, 2^413686781 is an apocalyptic number.

It is an amenable number.

413686781 is a deficient number, since it is larger than the sum of its proper divisors (61183).

413686781 is an equidigital number, since it uses as much as digits as its factorization.

413686781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61182.

The product of its digits is 193536, while the sum is 44.

The square root of 413686781 is about 20339.2915560007. The cubic root of 413686781 is about 745.1159863258.

The spelling of 413686781 in words is "four hundred thirteen million, six hundred eighty-six thousand, seven hundred eighty-one".