9997605 has 48 divisors (see below), whose sum is σ = 18420480. Its totient is φ = 5007744.

The previous prime is 9997601. The next prime is 9997613. The reversal of 9997605 is 5067999.

It is not a de Polignac number, because 9997605 - 2² = 9997601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61254 + ... + 61416.

It is an arithmetic number, because the mean of its divisors is an integer number (383760).

Almost surely, 2^9997605 is an apocalyptic number.

It is an amenable number.

9997605 is a deficient number, since it is larger than the sum of its proper divisors (8422875).

9997605 is a wasteful number, since it uses less digits than its factorization.

9997605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 9997605 is about 3161.8989547422. The cubic root of 9997605 is about 215.4262680596.

The spelling of 9997605 in words is "nine million, nine hundred ninety-seven thousand, six hundred five".