33981229 has 2 divisors, whose sum is σ = 33981230. Its totient is φ = 33981228.

The previous prime is 33981217. The next prime is 33981257. The reversal of 33981229 is 92218933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32775625 + 1205604 = 5725^2 + 1098^2 .

It is a cyclic number.

It is not a de Polignac number, because 33981229 - 2⁵ = 33981197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33981289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16990614 + 16990615.

It is an arithmetic number, because the mean of its divisors is an integer number (16990615).

Almost surely, 2^33981229 is an apocalyptic number.

It is an amenable number.

33981229 is a deficient number, since it is larger than the sum of its proper divisors (1).

33981229 is an equidigital number, since it uses as much as digits as its factorization.

33981229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 33981229 is about 5829.3420726528. The cubic root of 33981229 is about 323.9015507674.

The spelling of 33981229 in words is "thirty-three million, nine hundred eighty-one thousand, two hundred twenty-nine".