4387661 has 2 divisors, whose sum is σ = 4387662. Its totient is φ = 4387660.

The previous prime is 4387633. The next prime is 4387673. The reversal of 4387661 is 1667834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2992900 + 1394761 = 1730^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 4387661 - 2¹⁰ = 4386637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4387681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2193830 + 2193831.

It is an arithmetic number, because the mean of its divisors is an integer number (2193831).

Almost surely, 2^4387661 is an apocalyptic number.

It is an amenable number.

4387661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4387661 is an equidigital number, since it uses as much as digits as its factorization.

4387661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 4387661 is about 2094.6744377110. The cubic root of 4387661 is about 163.7109348763.

The spelling of 4387661 in words is "four million, three hundred eighty-seven thousand, six hundred sixty-one".