39668045 has 4 divisors (see below), whose sum is σ = 47601660. Its totient is φ = 31734432.

The previous prime is 39668039. The next prime is 39668051. The reversal of 39668045 is 54086693.

39668045 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: 54086693 = 1723 ⋅31391.

It is an interprime number because it is at equal distance from previous prime (39668039) and next prime (39668051).

It can be written as a sum of positive squares in 2 ways, for example, as 26081449 + 13586596 = 5107^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 39668045 - 2¹⁶ = 39602509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39667993 and 39668011.

It is a congruent number.

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, 3966800 + ... + 3966809.

It is an arithmetic number, because the mean of its divisors is an integer number (11900415).

Almost surely, 2^39668045 is an apocalyptic number.

It is an amenable number.

39668045 is a deficient number, since it is larger than the sum of its proper divisors (7933615).

39668045 is an equidigital number, since it uses as much as digits as its factorization.

39668045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7933614.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 39668045 is about 6298.2572986502. The cubic root of 39668045 is about 341.0465016863.

The spelling of 39668045 in words is "thirty-nine million, six hundred sixty-eight thousand, forty-five".