3753661 has 2 divisors, whose sum is σ = 3753662. Its totient is φ = 3753660.

The previous prime is 3753653. The next prime is 3753671. The reversal of 3753661 is 1663573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3667225 + 86436 = 1915^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 3753661 - 2³ = 3753653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3753611) 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, 1876830 + 1876831.

It is an arithmetic number, because the mean of its divisors is an integer number (1876831).

Almost surely, 2^3753661 is an apocalyptic number.

It is an amenable number.

3753661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3753661 is an equidigital number, since it uses as much as digits as its factorization.

3753661 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3753661 is about 1937.4367086437. The cubic root of 3753661 is about 155.4121669792.

The spelling of 3753661 in words is "three million, seven hundred fifty-three thousand, six hundred sixty-one".