41042021309 has 2 divisors, whose sum is σ = 41042021310. Its totient is φ = 41042021308.

The previous prime is 41042021297. The next prime is 41042021327. The reversal of 41042021309 is 90312024014.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33250428409 + 7791592900 = 182347^2 + 88270^2 .

It is a cyclic number.

It is not a de Polignac number, because 41042021309 - 2²⁴ = 41025244093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41042021329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20521010654 + 20521010655.

It is an arithmetic number, because the mean of its divisors is an integer number (20521010655).

Almost surely, 2^41042021309 is an apocalyptic number.

It is an amenable number.

41042021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

41042021309 is an equidigital number, since it uses as much as digits as its factorization.

41042021309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 41042021309 in words is "forty-one billion, forty-two million, twenty-one thousand, three hundred nine".