9939455 has 4 divisors (see below), whose sum is σ = 11927352. Its totient is φ = 7951560.

The previous prime is 9939403. The next prime is 9939463. The reversal of 9939455 is 5549399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5549399 = 439 ⋅12641.

It is not a de Polignac number, because 9939455 - 2¹⁰ = 9938431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993941 + ... + 993950.

It is an arithmetic number, because the mean of its divisors is an integer number (2981838).

Almost surely, 2^9939455 is an apocalyptic number.

9939455 is a deficient number, since it is larger than the sum of its proper divisors (1987897).

9939455 is a wasteful number, since it uses less digits than its factorization.

9939455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987896.

The product of its digits is 218700, while the sum is 44.

The square root of 9939455 is about 3152.6901211505. The cubic root of 9939455 is about 215.0077877114.

The spelling of 9939455 in words is "nine million, nine hundred thirty-nine thousand, four hundred fifty-five".