41020009 has 2 divisors, whose sum is σ = 41020010. Its totient is φ = 41020008.

The previous prime is 41020003. The next prime is 41020019. The reversal of 41020009 is 90002014.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37515625 + 3504384 = 6125^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 41020009 - 2⁹ = 41019497 is a prime.

It is a super-2 number, since 2×41020009² = 3365282276720162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 41019974 and 41020001.

It is not a weakly prime, because it can be changed into another prime (41020003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20510004 + 20510005.

It is an arithmetic number, because the mean of its divisors is an integer number (20510005).

Almost surely, 2^41020009 is an apocalyptic number.

It is an amenable number.

41020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

41020009 is an equidigital number, since it uses as much as digits as its factorization.

41020009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 41020009 is about 6404.6864872529. The cubic root of 41020009 is about 344.8778087196.

The spelling of 41020009 in words is "forty-one million, twenty thousand, nine".