33445889 has 2 divisors, whose sum is σ = 33445890. Its totient is φ = 33445888.

The previous prime is 33445879. The next prime is 33445901. The reversal of 33445889 is 98854433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29866225 + 3579664 = 5465^2 + 1892^2 .

It is an emirp because it is prime and its reverse (98854433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33445889 - 2¹⁶ = 33380353 is a prime.

It is a super-2 number, since 2×33445889² = 2237254982000642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (33445829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16722944 + 16722945.

It is an arithmetic number, because the mean of its divisors is an integer number (16722945).

Almost surely, 2^33445889 is an apocalyptic number.

It is an amenable number.

33445889 is a deficient number, since it is larger than the sum of its proper divisors (1).

33445889 is an equidigital number, since it uses as much as digits as its factorization.

33445889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 33445889 is about 5783.2420838142. The cubic root of 33445889 is about 322.1916255838.

The spelling of 33445889 in words is "thirty-three million, four hundred forty-five thousand, eight hundred eighty-nine".