41643491 has 2 divisors, whose sum is σ = 41643492. Its totient is φ = 41643490.

The previous prime is 41643487. The next prime is 41643517. The reversal of 41643491 is 19434614.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41643491 - 2² = 41643487 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41643401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20821745 + 20821746.

It is an arithmetic number, because the mean of its divisors is an integer number (20821746).

Almost surely, 2^41643491 is an apocalyptic number.

41643491 is a deficient number, since it is larger than the sum of its proper divisors (1).

41643491 is an equidigital number, since it uses as much as digits as its factorization.

41643491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 41643491 is about 6453.1768145620. The cubic root of 41643491 is about 346.6163488153.

The spelling of 41643491 in words is "forty-one million, six hundred forty-three thousand, four hundred ninety-one".