41609891 has 4 divisors (see below), whose sum is σ = 41623032. Its totient is φ = 41596752.

The previous prime is 41609861. The next prime is 41609917. The reversal of 41609891 is 19890614.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19890614 = 2 ⋅9945307.

It is a cyclic number.

It is not a de Polignac number, because 41609891 - 2¹⁰ = 41608867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41609831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415 + ... + 9231.

It is an arithmetic number, because the mean of its divisors is an integer number (10405758).

Almost surely, 2^41609891 is an apocalyptic number.

41609891 is a deficient number, since it is larger than the sum of its proper divisors (13141).

41609891 is an equidigital number, since it uses as much as digits as its factorization.

41609891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 41609891 is about 6450.5729202917. The cubic root of 41609891 is about 346.5231014057.

The spelling of 41609891 in words is "forty-one million, six hundred nine thousand, eight hundred ninety-one".