41506991 has 4 divisors (see below), whose sum is σ = 41571792. Its totient is φ = 41442192.

The previous prime is 41506967. The next prime is 41506999. The reversal of 41506991 is 19960514.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 41506991 - 2¹⁰ = 41505967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41506999) 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, 31430 + ... + 32723.

It is an arithmetic number, because the mean of its divisors is an integer number (10392948).

Almost surely, 2^41506991 is an apocalyptic number.

41506991 is a deficient number, since it is larger than the sum of its proper divisors (64801).

41506991 is an equidigital number, since it uses as much as digits as its factorization.

41506991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64800.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 41506991 is about 6442.5919473454. The cubic root of 41506991 is about 346.2372185718.

The spelling of 41506991 in words is "forty-one million, five hundred six thousand, nine hundred ninety-one".