33691139 has 2 divisors, whose sum is σ = 33691140. Its totient is φ = 33691138.

The previous prime is 33691117. The next prime is 33691157. The reversal of 33691139 is 93119633.

It is a strong prime.

It is an emirp because it is prime and its reverse (93119633) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33691139 is a prime.

It is a super-3 number, since 3×33691139³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 33691099 and 33691108.

It is not a weakly prime, because it can be changed into another prime (33691109) 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 as a sum of consecutive naturals, namely, 16845569 + 16845570.

It is an arithmetic number, because the mean of its divisors is an integer number (16845570).

Almost surely, 2^33691139 is an apocalyptic number.

33691139 is a deficient number, since it is larger than the sum of its proper divisors (1).

33691139 is an equidigital number, since it uses as much as digits as its factorization.

33691139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 35.

The square root of 33691139 is about 5804.4068603088. The cubic root of 33691139 is about 322.9772242852.

The spelling of 33691139 in words is "thirty-three million, six hundred ninety-one thousand, one hundred thirty-nine".