33379821 has 6 divisors (see below), whose sum is σ = 48215310. Its totient is φ = 22253208.

The previous prime is 33379817. The next prime is 33379837. The reversal of 33379821 is 12897333.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30404196 + 2975625 = 5514^2 + 1725^2 .

It is not a de Polignac number, because 33379821 - 2² = 33379817 is a prime.

It is a super-2 number, since 2×33379821² = 2228424899984082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33379121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1854426 + ... + 1854443.

It is an arithmetic number, because the mean of its divisors is an integer number (8035885).

Almost surely, 2^33379821 is an apocalyptic number.

It is an amenable number.

33379821 is a deficient number, since it is larger than the sum of its proper divisors (14835489).

33379821 is a wasteful number, since it uses less digits than its factorization.

33379821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708875 (or 3708872 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 33379821 is about 5777.5272392261. The cubic root of 33379821 is about 321.9793365339.

The spelling of 33379821 in words is "thirty-three million, three hundred seventy-nine thousand, eight hundred twenty-one".