39905441 has 2 divisors, whose sum is σ = 39905442. Its totient is φ = 39905440.

The previous prime is 39905431. The next prime is 39905473. The reversal of 39905441 is 14450993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35153041 + 4752400 = 5929^2 + 2180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39905441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39905431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19952720 + 19952721.

It is an arithmetic number, because the mean of its divisors is an integer number (19952721).

Almost surely, 2^39905441 is an apocalyptic number.

It is an amenable number.

39905441 is a deficient number, since it is larger than the sum of its proper divisors (1).

39905441 is an equidigital number, since it uses as much as digits as its factorization.

39905441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 39905441 is about 6317.0753517747. The cubic root of 39905441 is about 341.7254873414.

The spelling of 39905441 in words is "thirty-nine million, nine hundred five thousand, four hundred forty-one".