7945 has 8 divisors (see below), whose sum is σ = 10944. Its totient is φ = 5424.

The previous prime is 7937. The next prime is 7949. The reversal of 7945 is 5497.

7945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 7945 - 2³ = 7937 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (7949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79 + ... + 148.

It is an arithmetic number, because the mean of its divisors is an integer number (1368).

2⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

7945 is a deficient number, since it is larger than the sum of its proper divisors (2999).

7945 is a wasteful number, since it uses less digits than its factorization.

7945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its digits is 1260, while the sum is 25.

The square root of 7945 is about 89.1347294830. The cubic root of 7945 is about 19.9540612289.

The spelling of 7945 in words is "seven thousand, nine hundred forty-five".