33636397 has 4 divisors (see below), whose sum is σ = 34271100. Its totient is φ = 33001696.

The previous prime is 33636391. The next prime is 33636409. The reversal of 33636397 is 79363633.

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 11930116 + 21706281 = 3454^2 + 4659^2 .

It is a cyclic number.

It is not a de Polignac number, because 33636397 - 2³ = 33636389 is a prime.

It is a super-2 number, since 2×33636397² = 2262814406283218, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33636391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317272 + ... + 317377.

It is an arithmetic number, because the mean of its divisors is an integer number (8567775).

Almost surely, 2^33636397 is an apocalyptic number.

It is an amenable number.

33636397 is a deficient number, since it is larger than the sum of its proper divisors (634703).

33636397 is an equidigital number, since it uses as much as digits as its factorization.

33636397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634702.

The product of its digits is 183708, while the sum is 40.

The square root of 33636397 is about 5799.6893882345. The cubic root of 33636397 is about 322.8022029570.

The spelling of 33636397 in words is "thirty-three million, six hundred thirty-six thousand, three hundred ninety-seven".