8147945 has 8 divisors (see below), whose sum is σ = 10529736. Its totient is φ = 6016896.

The previous prime is 8147933. The next prime is 8147963. The reversal of 8147945 is 5497418.

It can be written as a sum of positive squares in 4 ways, for example, as 218089 + 7929856 = 467^2 + 2816^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8147945 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8147899 and 8147908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62612 + ... + 62741.

It is an arithmetic number, because the mean of its divisors is an integer number (1316217).

Almost surely, 2^8147945 is an apocalyptic number.

It is an amenable number.

8147945 is a deficient number, since it is larger than the sum of its proper divisors (2381791).

8147945 is a wasteful number, since it uses less digits than its factorization.

8147945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125371.

The product of its digits is 40320, while the sum is 38.

The square root of 8147945 is about 2854.4605444812. The cubic root of 8147945 is about 201.2253522275.

The spelling of 8147945 in words is "eight million, one hundred forty-seven thousand, nine hundred forty-five".