3661573 has 2 divisors, whose sum is σ = 3661574. Its totient is φ = 3661572.

The previous prime is 3661561. The next prime is 3661583. The reversal of 3661573 is 3751663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3526884 + 134689 = 1878^2 + 367^2 .

It is an emirp because it is prime and its reverse (3751663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3661573 - 2²¹ = 1564421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830786 + 1830787.

It is an arithmetic number, because the mean of its divisors is an integer number (1830787).

Almost surely, 2^3661573 is an apocalyptic number.

It is an amenable number.

3661573 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661573 is an equidigital number, since it uses as much as digits as its factorization.

3661573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 31.

The square root of 3661573 is about 1913.5237129443. The cubic root of 3661573 is about 154.1307289335.

The spelling of 3661573 in words is "three million, six hundred sixty-one thousand, five hundred seventy-three".