2129447 has 2 divisors, whose sum is σ = 2129448. Its totient is φ = 2129446.

The previous prime is 2129443. The next prime is 2129473. The reversal of 2129447 is 7449212.

2129447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2129447 - 2² = 2129443 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064723 + 1064724.

It is an arithmetic number, because the mean of its divisors is an integer number (1064724).

2^2129447 is an apocalyptic number.

2129447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129447 is an equidigital number, since it uses as much as digits as its factorization.

2129447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 2129447 is about 1459.2624849560. The cubic root of 2129447 is about 128.6536993145.

The spelling of 2129447 in words is "two million, one hundred twenty-nine thousand, four hundred forty-seven".