33139955 has 4 divisors (see below), whose sum is σ = 39767952. Its totient is φ = 26511960.

The previous prime is 33139949. The next prime is 33139969. The reversal of 33139955 is 55993133.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 33139955 - 2⁶ = 33139891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 3313991 + ... + 3314000.

It is an arithmetic number, because the mean of its divisors is an integer number (9941988).

Almost surely, 2^33139955 is an apocalyptic number.

33139955 is a deficient number, since it is larger than the sum of its proper divisors (6627997).

33139955 is an equidigital number, since it uses as much as digits as its factorization.

33139955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627996.

The product of its digits is 54675, while the sum is 38.

The square root of 33139955 is about 5756.7312773830. The cubic root of 33139955 is about 321.2062383929.

The spelling of 33139955 in words is "thirty-three million, one hundred thirty-nine thousand, nine hundred fifty-five".