33636389 has 2 divisors, whose sum is σ = 33636390. Its totient is φ = 33636388.

The previous prime is 33636347. The next prime is 33636391. The reversal of 33636389 is 98363633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23203489 + 10432900 = 4817^2 + 3230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33636389 is a prime.

It is a super-2 number, since 2×33636389² = 2262813329918642, which contains 22 as substring.

Together with 33636391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33636329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16818194 + 16818195.

It is an arithmetic number, because the mean of its divisors is an integer number (16818195).

Almost surely, 2^33636389 is an apocalyptic number.

It is an amenable number.

33636389 is a deficient number, since it is larger than the sum of its proper divisors (1).

33636389 is an equidigital number, since it uses as much as digits as its factorization.

33636389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 41.

The square root of 33636389 is about 5799.6886985424. The cubic root of 33636389 is about 322.8021773655.

The spelling of 33636389 in words is "thirty-three million, six hundred thirty-six thousand, three hundred eighty-nine".