7647945 has 8 divisors (see below), whose sum is σ = 12236736. Its totient is φ = 4078896.

The previous prime is 7647931. The next prime is 7647949. The reversal of 7647945 is 5497467.

7647945 is digitally balanced in base 4, 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 not a de Polignac number, because 7647945 - 2⁶ = 7647881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7647897 and 7647906.

It is not an unprimeable number, because it can be changed into a prime (7647949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254917 + ... + 254946.

It is an arithmetic number, because the mean of its divisors is an integer number (1529592).

Almost surely, 2^7647945 is an apocalyptic number.

It is an amenable number.

7647945 is a deficient number, since it is larger than the sum of its proper divisors (4588791).

7647945 is a wasteful number, since it uses less digits than its factorization.

7647945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509871.

The product of its digits is 211680, while the sum is 42.

The square root of 7647945 is about 2765.4918188272. The cubic root of 7647945 is about 197.0220886189.

The spelling of 7647945 in words is "seven million, six hundred forty-seven thousand, nine hundred forty-five".