9138645 has 24 divisors (see below), whose sum is σ = 16353792. Its totient is φ = 4716000.

The previous prime is 9138637. The next prime is 9138697. The reversal of 9138645 is 5468319.

9138645 is a `hidden beast` number, since 9 + 1 + 3 + 8 + 645 = 666.

It is not a de Polignac number, because 9138645 - 2³ = 9138637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1881 + ... + 4670.

It is an arithmetic number, because the mean of its divisors is an integer number (681408).

Almost surely, 2^9138645 is an apocalyptic number.

It is an amenable number.

9138645 is a deficient number, since it is larger than the sum of its proper divisors (7215147).

9138645 is a wasteful number, since it uses less digits than its factorization.

9138645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593 (or 6590 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 9138645 is about 3023.0191861780. The cubic root of 9138645 is about 209.0710670006.

The spelling of 9138645 in words is "nine million, one hundred thirty-eight thousand, six hundred forty-five".