9855957 has 4 divisors (see below), whose sum is σ = 13141280. Its totient is φ = 6570636.

The previous prime is 9855943. The next prime is 9855959. The reversal of 9855957 is 7595589.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9855957 - 2⁴ = 9855941 is a prime.

It is a Duffinian number.

9855957 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855959) 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, 1642657 + ... + 1642662.

It is an arithmetic number, because the mean of its divisors is an integer number (3285320).

Almost surely, 2^9855957 is an apocalyptic number.

It is an amenable number.

9855957 is a deficient number, since it is larger than the sum of its proper divisors (3285323).

9855957 is a wasteful number, since it uses less digits than its factorization.

9855957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285322.

The product of its digits is 567000, while the sum is 48.

The square root of 9855957 is about 3139.4198508642. The cubic root of 9855957 is about 214.4040246353.

The spelling of 9855957 in words is "nine million, eight hundred fifty-five thousand, nine hundred fifty-seven".