9997507 has 4 divisors (see below), whose sum is σ = 10766560. Its totient is φ = 9228456.

The previous prime is 9997483. The next prime is 9997517. The reversal of 9997507 is 7057999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7057999 = 13 ⋅542923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9997507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9997517) 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, 384507 + ... + 384532.

It is an arithmetic number, because the mean of its divisors is an integer number (2691640).

Almost surely, 2^9997507 is an apocalyptic number.

9997507 is a deficient number, since it is larger than the sum of its proper divisors (769053).

9997507 is a wasteful number, since it uses less digits than its factorization.

9997507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769052.

The product of its (nonzero) digits is 178605, while the sum is 46.

The square root of 9997507 is about 3161.8834576878. The cubic root of 9997507 is about 215.4255641629.

The spelling of 9997507 in words is "nine million, nine hundred ninety-seven thousand, five hundred seven".