9138649 has 8 divisors (see below), whose sum is σ = 9930312. Its totient is φ = 8359680.

The previous prime is 9138637. The next prime is 9138697. The reversal of 9138649 is 9468319.

It can be written as a sum of positive squares in 4 ways, for example, as 1537600 + 7601049 = 1240^2 + 2757^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 9138649 - 2⁹ = 9138137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9138049) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1642 + ... + 4579.

It is an arithmetic number, because the mean of its divisors is an integer number (1241289).

Almost surely, 2^9138649 is an apocalyptic number.

It is an amenable number.

9138649 is a deficient number, since it is larger than the sum of its proper divisors (791663).

9138649 is a wasteful number, since it uses less digits than its factorization.

9138649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6347.

The product of its digits is 46656, while the sum is 40.

The square root of 9138649 is about 3023.0198477681. The cubic root of 9138649 is about 209.0710975042.

The spelling of 9138649 in words is "nine million, one hundred thirty-eight thousand, six hundred forty-nine".