3627661 has 2 divisors, whose sum is σ = 3627662. Its totient is φ = 3627660.

The previous prime is 3627653. The next prime is 3627671. The reversal of 3627661 is 1667263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3261636 + 366025 = 1806^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 3627661 - 2³ = 3627653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3627641) 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, 1813830 + 1813831.

It is an arithmetic number, because the mean of its divisors is an integer number (1813831).

Almost surely, 2^3627661 is an apocalyptic number.

It is an amenable number.

3627661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3627661 is an equidigital number, since it uses as much as digits as its factorization.

3627661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 3627661 is about 1904.6419611045. The cubic root of 3627661 is about 153.6534202978.

The spelling of 3627661 in words is "three million, six hundred twenty-seven thousand, six hundred sixty-one".