41721909 has 16 divisors (see below), whose sum is σ = 57364800. Its totient is φ = 26960256.

The previous prime is 41721907. The next prime is 41721941. The reversal of 41721909 is 90912714.

It is not a de Polignac number, because 41721909 - 2¹ = 41721907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41721909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41721907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11307 + ... + 14535.

It is an arithmetic number, because the mean of its divisors is an integer number (3585300).

Almost surely, 2^41721909 is an apocalyptic number.

It is an amenable number.

41721909 is a deficient number, since it is larger than the sum of its proper divisors (15642891).

41721909 is a wasteful number, since it uses less digits than its factorization.

41721909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 41721909 is about 6459.2498790494. The cubic root of 41721909 is about 346.8337810936.

The spelling of 41721909 in words is "forty-one million, seven hundred twenty-one thousand, nine hundred nine".