9997575 has 48 divisors (see below), whose sum is σ = 19165440. Its totient is φ = 4504320.

The previous prime is 9997573. The next prime is 9997577. The reversal of 9997575 is 5757999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9997573) and next prime (9997577).

It is not a de Polignac number, because 9997575 - 2¹ = 9997573 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997573) 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, 71856 + ... + 71994.

It is an arithmetic number, because the mean of its divisors is an integer number (399280).

Almost surely, 2^9997575 is an apocalyptic number.

9997575 is a deficient number, since it is larger than the sum of its proper divisors (9167865).

9997575 is a wasteful number, since it uses less digits than its factorization.

9997575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 291 counting only the distinct ones).

The product of its digits is 893025, while the sum is 51.

The square root of 9997575 is about 3161.8942107541. The cubic root of 9997575 is about 215.4260525815.

The spelling of 9997575 in words is "nine million, nine hundred ninety-seven thousand, five hundred seventy-five".