41997209 has 4 divisors (see below), whose sum is σ = 42017040. Its totient is φ = 41977380.

The previous prime is 41997199. The next prime is 41997211. The reversal of 41997209 is 90279914.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90279914 = 2 ⋅45139957.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41997209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41997299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6299 + ... + 11120.

It is an arithmetic number, because the mean of its divisors is an integer number (10504260).

Almost surely, 2^41997209 is an apocalyptic number.

It is an amenable number.

41997209 is a deficient number, since it is larger than the sum of its proper divisors (19831).

41997209 is a wasteful number, since it uses less digits than its factorization.

41997209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19830.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 41997209 is about 6480.5253645056. The cubic root of 41997209 is about 347.5949646432.

The spelling of 41997209 in words is "forty-one million, nine hundred ninety-seven thousand, two hundred nine".