33139901 has 4 divisors (see below), whose sum is σ = 34035612. Its totient is φ = 32244192.

The previous prime is 33139891. The next prime is 33139921. The reversal of 33139901 is 10993133.

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 15792676 + 17347225 = 3974^2 + 4165^2 .

It is a cyclic number.

It is not a de Polignac number, because 33139901 - 2²² = 28945597 is a prime.

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 (33139921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447800 + ... + 447873.

It is an arithmetic number, because the mean of its divisors is an integer number (8508903).

Almost surely, 2^33139901 is an apocalyptic number.

It is an amenable number.

33139901 is a deficient number, since it is larger than the sum of its proper divisors (895711).

33139901 is an equidigital number, since it uses as much as digits as its factorization.

33139901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895710.

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

The square root of 33139901 is about 5756.7265872195. The cubic root of 33139901 is about 321.2060639293.

The spelling of 33139901 in words is "thirty-three million, one hundred thirty-nine thousand, nine hundred one".