33999121 has 4 divisors (see below), whose sum is σ = 36614452. Its totient is φ = 31383792.

The previous prime is 33999103. The next prime is 33999137. The reversal of 33999121 is 12199933.

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 1918225 + 32080896 = 1385^2 + 5664^2 .

It is a cyclic number.

It is not a de Polignac number, because 33999121 - 2⁵ = 33999089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33999181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307646 + ... + 1307671.

It is an arithmetic number, because the mean of its divisors is an integer number (9153613).

Almost surely, 2^33999121 is an apocalyptic number.

It is an amenable number.

33999121 is a deficient number, since it is larger than the sum of its proper divisors (2615331).

33999121 is a wasteful number, since it uses less digits than its factorization.

33999121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615330.

The product of its digits is 13122, while the sum is 37.

The square root of 33999121 is about 5830.8765207300. The cubic root of 33999121 is about 323.9583883206.

The spelling of 33999121 in words is "thirty-three million, nine hundred ninety-nine thousand, one hundred twenty-one".