2109447 has 6 divisors (see below), whose sum is σ = 3046992. Its totient is φ = 1406292.

The previous prime is 2109421. The next prime is 2109449. The reversal of 2109447 is 7449012.

It is a happy number.

2109447 is a `hidden beast` number, since 210 + 9 + 447 = 666.

It is not a de Polignac number, because 2109447 - 2¹⁶ = 2043911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2109447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117183 + ... + 117200.

It is an arithmetic number, because the mean of its divisors is an integer number (507832).

2^2109447 is an apocalyptic number.

2109447 is a deficient number, since it is larger than the sum of its proper divisors (937545).

2109447 is a wasteful number, since it uses less digits than its factorization.

2109447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234389 (or 234386 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2109447 is about 1452.3935417097. The cubic root of 2109447 is about 128.2496551636.

It can be divided in two parts, 2109 and 447, that added together give a triangular number (2556 = T₇₁).

The spelling of 2109447 in words is "two million, one hundred nine thousand, four hundred forty-seven".