9906397 has 4 divisors (see below), whose sum is σ = 9961920. Its totient is φ = 9850876.

The previous prime is 9906367. The next prime is 9906401. The reversal of 9906397 is 7936099.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7936099 = 1153 ⋅6883.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9906397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9906367) 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, 27493 + ... + 27850.

It is an arithmetic number, because the mean of its divisors is an integer number (2490480).

Almost surely, 2^9906397 is an apocalyptic number.

It is an amenable number.

9906397 is a deficient number, since it is larger than the sum of its proper divisors (55523).

9906397 is a wasteful number, since it uses less digits than its factorization.

9906397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55522.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 9906397 is about 3147.4429303802. The cubic root of 9906397 is about 214.7691555131.

The spelling of 9906397 in words is "nine million, nine hundred six thousand, three hundred ninety-seven".