9857949 has 4 divisors (see below), whose sum is σ = 13143936. Its totient is φ = 6571964.

The previous prime is 9857933. The next prime is 9857957. The reversal of 9857949 is 9497589.

It is a happy number.

9857949 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 9857949 - 2⁴ = 9857933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9857959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642989 + ... + 1642994.

It is an arithmetic number, because the mean of its divisors is an integer number (3285984).

Almost surely, 2^9857949 is an apocalyptic number.

It is an amenable number.

9857949 is a deficient number, since it is larger than the sum of its proper divisors (3285987).

9857949 is a wasteful number, since it uses less digits than its factorization.

9857949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285986.

The product of its digits is 816480, while the sum is 51.

The square root of 9857949 is about 3139.7370909043. The cubic root of 9857949 is about 214.4184681523.

The spelling of 9857949 in words is "nine million, eight hundred fifty-seven thousand, nine hundred forty-nine".