3641887 has 2 divisors, whose sum is σ = 3641888. Its totient is φ = 3641886.

The previous prime is 3641881. The next prime is 3641917. The reversal of 3641887 is 7881463.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3641887 is a prime.

3641887 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3641881) 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, 1820943 + 1820944.

It is an arithmetic number, because the mean of its divisors is an integer number (1820944).

Almost surely, 2^3641887 is an apocalyptic number.

3641887 is a deficient number, since it is larger than the sum of its proper divisors (1).

3641887 is an equidigital number, since it uses as much as digits as its factorization.

3641887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 3641887 is about 1908.3728671305. The cubic root of 3641887 is about 153.8540107462.

The spelling of 3641887 in words is "three million, six hundred forty-one thousand, eight hundred eighty-seven".