39805345 has 4 divisors (see below), whose sum is σ = 47766420. Its totient is φ = 31844272.

The previous prime is 39805321. The next prime is 39805357. The reversal of 39805345 is 54350893.

39805345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54350893 = 1021 ⋅53233.

It can be written as a sum of positive squares in 2 ways, for example, as 24681024 + 15124321 = 4968^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 39805345 - 2⁹ = 39804833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3980530 + ... + 3980539.

It is an arithmetic number, because the mean of its divisors is an integer number (11941605).

Almost surely, 2^39805345 is an apocalyptic number.

It is an amenable number.

39805345 is a deficient number, since it is larger than the sum of its proper divisors (7961075).

39805345 is an equidigital number, since it uses as much as digits as its factorization.

39805345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7961074.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 39805345 is about 6309.1477237421. The cubic root of 39805345 is about 341.4395280597.

The spelling of 39805345 in words is "thirty-nine million, eight hundred five thousand, three hundred forty-five".