39279145 has 4 divisors (see below), whose sum is σ = 47134980. Its totient is φ = 31423312.

The previous prime is 39279143. The next prime is 39279151. The reversal of 39279145 is 54197293.

39279145 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.

It can be written as a sum of positive squares in 2 ways, for example, as 21706281 + 17572864 = 4659^2 + 4192^2 .

It is a cyclic number.

It is not a de Polignac number, because 39279145 - 2¹ = 39279143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39279098 and 39279107.

It is not an unprimeable number, because it can be changed into a prime (39279143) by changing a digit.

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, 3927910 + ... + 3927919.

It is an arithmetic number, because the mean of its divisors is an integer number (11783745).

Almost surely, 2^39279145 is an apocalyptic number.

It is an amenable number.

39279145 is a deficient number, since it is larger than the sum of its proper divisors (7855835).

39279145 is an equidigital number, since it uses as much as digits as its factorization.

39279145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855834.

The product of its digits is 68040, while the sum is 40.

The square root of 39279145 is about 6267.3076356598. The cubic root of 39279145 is about 339.9283153371.

The spelling of 39279145 in words is "thirty-nine million, two hundred seventy-nine thousand, one hundred forty-five".