33139091 has 2 divisors, whose sum is σ = 33139092. Its totient is φ = 33139090.

The previous prime is 33139079. The next prime is 33139121. The reversal of 33139091 is 19093133.

It is a weak prime.

It is an emirp because it is prime and its reverse (19093133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33139091 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (33139391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16569545 + 16569546.

It is an arithmetic number, because the mean of its divisors is an integer number (16569546).

Almost surely, 2^33139091 is an apocalyptic number.

33139091 is a deficient number, since it is larger than the sum of its proper divisors (1).

33139091 is an equidigital number, since it uses as much as digits as its factorization.

33139091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 33139091 is about 5756.6562343082. The cubic root of 33139091 is about 321.2034469527.

The spelling of 33139091 in words is "thirty-three million, one hundred thirty-nine thousand, ninety-one".