39109745 has 8 divisors (see below), whose sum is σ = 47362920. Its totient is φ = 31000320.

The previous prime is 39109739. The next prime is 39109753. The reversal of 39109745 is 54790193.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4734976 + 34374769 = 2176^2 + 5863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-39109745 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39109699 and 39109708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35336 + ... + 36425.

It is an arithmetic number, because the mean of its divisors is an integer number (5920365).

Almost surely, 2^39109745 is an apocalyptic number.

It is an amenable number.

39109745 is a deficient number, since it is larger than the sum of its proper divisors (8253175).

39109745 is a wasteful number, since it uses less digits than its factorization.

39109745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71875.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 39109745 is about 6253.7784578605. The cubic root of 39109745 is about 339.4389391336.

The spelling of 39109745 in words is "thirty-nine million, one hundred nine thousand, seven hundred forty-five".