39905473 has 2 divisors, whose sum is σ = 39905474. Its totient is φ = 39905472.

The previous prime is 39905441. The next prime is 39905501. The reversal of 39905473 is 37450993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33315984 + 6589489 = 5772^2 + 2567^2 .

It is a cyclic number.

It is not a de Polignac number, because 39905473 - 2⁵ = 39905441 is a prime.

It is not a weakly prime, because it can be changed into another prime (39905413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19952736 + 19952737.

It is an arithmetic number, because the mean of its divisors is an integer number (19952737).

Almost surely, 2^39905473 is an apocalyptic number.

It is an amenable number.

39905473 is a deficient number, since it is larger than the sum of its proper divisors (1).

39905473 is an equidigital number, since it uses as much as digits as its factorization.

39905473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 39905473 is about 6317.0778845919. The cubic root of 39905473 is about 341.7255786841.

The spelling of 39905473 in words is "thirty-nine million, nine hundred five thousand, four hundred seventy-three".