9939775 has 6 divisors (see below), whose sum is σ = 12325352. Its totient is φ = 7951800.

The previous prime is 9939773. The next prime is 9939799. The reversal of 9939775 is 5779399.

It is not a de Polignac number, because 9939775 - 2¹ = 9939773 is a prime.

It is a Duffinian number.

9939775 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198771 + ... + 198820.

Almost surely, 2^9939775 is an apocalyptic number.

9939775 is a deficient number, since it is larger than the sum of its proper divisors (2385577).

9939775 is a wasteful number, since it uses less digits than its factorization.

9939775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397601 (or 397596 counting only the distinct ones).

The product of its digits is 535815, while the sum is 49.

The square root of 9939775 is about 3152.7408710517. The cubic root of 9939775 is about 215.0100950731.

The spelling of 9939775 in words is "nine million, nine hundred thirty-nine thousand, seven hundred seventy-five".