336781 has 4 divisors (see below), whose sum is σ = 342364. Its totient is φ = 331200.

The previous prime is 336773. The next prime is 336793. The reversal of 336781 is 187633.

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 44100 + 292681 = 210^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 336781 - 2³ = 336773 is a prime.

It is a super-2 number, since 2×336781² = 226842883922, which contains 22 as substring.

It is a Duffinian number.

336781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (336761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2700 + ... + 2821.

It is an arithmetic number, because the mean of its divisors is an integer number (85591).

2³³⁶⁷⁸¹ is an apocalyptic number.

It is an amenable number.

336781 is a deficient number, since it is larger than the sum of its proper divisors (5583).

336781 is an equidigital number, since it uses as much as digits as its factorization.

336781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582.

The product of its digits is 3024, while the sum is 28.

The square root of 336781 is about 580.3283553300. The cubic root of 336781 is about 69.5743558364.

The spelling of 336781 in words is "three hundred thirty-six thousand, seven hundred eighty-one".