9909597 has 4 divisors (see below), whose sum is σ = 13212800. Its totient is φ = 6606396.

The previous prime is 9909593. The next prime is 9909611. The reversal of 9909597 is 7959099.

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: 7959099 = 3 ⋅2653033.

It is not a de Polignac number, because 9909597 - 2² = 9909593 is a prime.

It is a super-2 number, since 2×9909597² = 196400225404818, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9909593) 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, 1651597 + ... + 1651602.

It is an arithmetic number, because the mean of its divisors is an integer number (3303200).

Almost surely, 2^9909597 is an apocalyptic number.

It is an amenable number.

9909597 is a deficient number, since it is larger than the sum of its proper divisors (3303203).

9909597 is a wasteful number, since it uses less digits than its factorization.

9909597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303202.

The product of its (nonzero) digits is 229635, while the sum is 48.

The square root of 9909597 is about 3147.9512385042. The cubic root of 9909597 is about 214.7922781920.

The spelling of 9909597 in words is "nine million, nine hundred nine thousand, five hundred ninety-seven".