9813945 has 16 divisors (see below), whose sum is σ = 15748992. Its totient is φ = 5218560.

The previous prime is 9813907. The next prime is 9813961. The reversal of 9813945 is 5493189.

It is not a de Polignac number, because 9813945 - 2²³ = 1425337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5740 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (984312).

Almost surely, 2^9813945 is an apocalyptic number.

It is an amenable number.

9813945 is a deficient number, since it is larger than the sum of its proper divisors (5935047).

9813945 is a wasteful number, since it uses less digits than its factorization.

9813945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952.

The product of its digits is 38880, while the sum is 39.

The square root of 9813945 is about 3132.7216601543. The cubic root of 9813945 is about 214.0989512402.

The spelling of 9813945 in words is "nine million, eight hundred thirteen thousand, nine hundred forty-five".