33869813 has 4 divisors (see below), whose sum is σ = 34695948. Its totient is φ = 33043680.

The previous prime is 33869807. The next prime is 33869819. The reversal of 33869813 is 31896833.

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

It is an interprime number because it is at equal distance from previous prime (33869807) and next prime (33869819).

It can be written as a sum of positive squares in 2 ways, for example, as 611524 + 33258289 = 782^2 + 5767^2 .

It is a cyclic number.

It is not a de Polignac number, because 33869813 - 2¹⁰ = 33868789 is a prime.

It is a super-2 number, since 2×33869813² = 2294328465309938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 826093 = 33869813 / (3 + 3 + 8 + 6 + 9 + 8 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33869819) 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, 413006 + ... + 413087.

It is an arithmetic number, because the mean of its divisors is an integer number (8673987).

Almost surely, 2^33869813 is an apocalyptic number.

It is an amenable number.

33869813 is a deficient number, since it is larger than the sum of its proper divisors (826135).

33869813 is an equidigital number, since it uses as much as digits as its factorization.

33869813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826134.

The product of its digits is 93312, while the sum is 41.

The square root of 33869813 is about 5819.7777448971. Note that the first 4 decimals coincide. The cubic root of 33869813 is about 323.5471656237.

The spelling of 33869813 in words is "thirty-three million, eight hundred sixty-nine thousand, eight hundred thirteen".