9957399 has 4 divisors (see below), whose sum is σ = 13276536. Its totient is φ = 6638264.

The previous prime is 9957391. The next prime is 9957401. The reversal of 9957399 is 9937599.

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

It is a cyclic number.

It is not a de Polignac number, because 9957399 - 2³ = 9957391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9957391) 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, 1659564 + ... + 1659569.

It is an arithmetic number, because the mean of its divisors is an integer number (3319134).

Almost surely, 2^9957399 is an apocalyptic number.

9957399 is a deficient number, since it is larger than the sum of its proper divisors (3319137).

9957399 is a wasteful number, since it uses less digits than its factorization.

9957399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319136.

The product of its digits is 688905, while the sum is 51.

The square root of 9957399 is about 3155.5346615114. The cubic root of 9957399 is about 215.1370966240.

The spelling of 9957399 in words is "nine million, nine hundred fifty-seven thousand, three hundred ninety-nine".