3928229 has 2 divisors, whose sum is σ = 3928230. Its totient is φ = 3928228.

The previous prime is 3928189. The next prime is 3928247. The reversal of 3928229 is 9228293.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3441025 + 487204 = 1855^2 + 698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3928229 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3928259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964114 + 1964115.

It is an arithmetic number, because the mean of its divisors is an integer number (1964115).

Almost surely, 2^3928229 is an apocalyptic number.

It is an amenable number.

3928229 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928229 is an equidigital number, since it uses as much as digits as its factorization.

3928229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 3928229 is about 1981.9760341639. The cubic root of 3928229 is about 157.7849582169.

The spelling of 3928229 in words is "three million, nine hundred twenty-eight thousand, two hundred twenty-nine".