7939645 has 16 divisors (see below), whose sum is σ = 11184768. Its totient is φ = 5296320.

The previous prime is 7939643. The next prime is 7939661. The reversal of 7939645 is 5469397.

It is not a de Polignac number, because 7939645 - 2¹ = 7939643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7939643) 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 15 ways as a sum of consecutive naturals, for example, 1771 + ... + 4360.

It is an arithmetic number, because the mean of its divisors is an integer number (699048).

Almost surely, 2^7939645 is an apocalyptic number.

It is an amenable number.

7939645 is a deficient number, since it is larger than the sum of its proper divisors (3245123).

7939645 is a wasteful number, since it uses less digits than its factorization.

7939645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180.

The product of its digits is 204120, while the sum is 43.

The square root of 7939645 is about 2817.7375676241. The cubic root of 7939645 is about 199.4957715031.

The spelling of 7939645 in words is "seven million, nine hundred thirty-nine thousand, six hundred forty-five".