41990309 has 2 divisors, whose sum is σ = 41990310. Its totient is φ = 41990308.

The previous prime is 41990303. The next prime is 41990321. The reversal of 41990309 is 90309914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41242084 + 748225 = 6422^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 41990309 - 2¹² = 41986213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41990303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20995154 + 20995155.

It is an arithmetic number, because the mean of its divisors is an integer number (20995155).

Almost surely, 2^41990309 is an apocalyptic number.

It is an amenable number.

41990309 is a deficient number, since it is larger than the sum of its proper divisors (1).

41990309 is an equidigital number, since it uses as much as digits as its factorization.

41990309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 41990309 is about 6479.9929783913. The cubic root of 41990309 is about 347.5759273732.

The spelling of 41990309 in words is "forty-one million, nine hundred ninety thousand, three hundred nine".