9115945 has 4 divisors (see below), whose sum is σ = 10939140. Its totient is φ = 7292752.

The previous prime is 9115943. The next prime is 9115993. The reversal of 9115945 is 5495119.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5495119 = 7 ⋅785017.

It can be written as a sum of positive squares in 2 ways, for example, as 5890329 + 3225616 = 2427^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 9115945 - 2¹ = 9115943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9115945.

It is not an unprimeable number, because it can be changed into a prime (9115943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911590 + ... + 911599.

It is an arithmetic number, because the mean of its divisors is an integer number (2734785).

Almost surely, 2^9115945 is an apocalyptic number.

It is an amenable number.

9115945 is a deficient number, since it is larger than the sum of its proper divisors (1823195).

9115945 is a wasteful number, since it uses less digits than its factorization.

9115945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823194.

The product of its digits is 8100, while the sum is 34.

The square root of 9115945 is about 3019.2623271256. The cubic root of 9115945 is about 208.8978156342.

It can be divided in two parts, 91159 and 45, that added together give a square (91204 = 302²).

The spelling of 9115945 in words is "nine million, one hundred fifteen thousand, nine hundred forty-five".