9938545 has 4 divisors (see below), whose sum is σ = 11926260. Its totient is φ = 7950832.

The previous prime is 9938531. The next prime is 9938549. The reversal of 9938545 is 5458399.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6780816 + 3157729 = 2604^2 + 1777^2 .

It is a cyclic number.

It is not a de Polignac number, because 9938545 - 2⁷ = 9938417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9938549) 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 3 ways as a sum of consecutive naturals, for example, 993850 + ... + 993859.

It is an arithmetic number, because the mean of its divisors is an integer number (2981565).

Almost surely, 2^9938545 is an apocalyptic number.

It is an amenable number.

9938545 is a deficient number, since it is larger than the sum of its proper divisors (1987715).

9938545 is a wasteful number, since it uses less digits than its factorization.

9938545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987714.

The product of its digits is 194400, while the sum is 43.

The square root of 9938545 is about 3152.5457966539. The cubic root of 9938545 is about 215.0012258809.

The spelling of 9938545 in words is "nine million, nine hundred thirty-eight thousand, five hundred forty-five".