33821429 has 2 divisors, whose sum is σ = 33821430. Its totient is φ = 33821428.

The previous prime is 33821419. The next prime is 33821467. The reversal of 33821429 is 92412833.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33292900 + 528529 = 5770^2 + 727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33821429 is a prime.

It is a super-2 number, since 2×33821429² = 2287778119204082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33821395 and 33821404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33821419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16910714 + 16910715.

It is an arithmetic number, because the mean of its divisors is an integer number (16910715).

Almost surely, 2^33821429 is an apocalyptic number.

It is an amenable number.

33821429 is a deficient number, since it is larger than the sum of its proper divisors (1).

33821429 is an equidigital number, since it uses as much as digits as its factorization.

33821429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 33821429 is about 5815.6193995137. The cubic root of 33821429 is about 323.3930267323.

The spelling of 33821429 in words is "thirty-three million, eight hundred twenty-one thousand, four hundred twenty-nine".