3661447 has 2 divisors, whose sum is σ = 3661448. Its totient is φ = 3661446.

The previous prime is 3661429. The next prime is 3661457. The reversal of 3661447 is 7441663.

It is a strong prime.

It is an emirp because it is prime and its reverse (7441663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3661447 - 2¹¹ = 3659399 is a prime.

It is an Ulam number.

3661447 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830723 + 1830724.

It is an arithmetic number, because the mean of its divisors is an integer number (1830724).

Almost surely, 2^3661447 is an apocalyptic number.

3661447 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661447 is an equidigital number, since it uses as much as digits as its factorization.

3661447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 3661447 is about 1913.4907891077. The cubic root of 3661447 is about 154.1289609598.

The spelling of 3661447 in words is "three million, six hundred sixty-one thousand, four hundred forty-seven".