9997537 has 8 divisors (see below), whose sum is σ = 10936800. Its totient is φ = 9063360.

The previous prime is 9997523. The next prime is 9997573. The reversal of 9997537 is 7357999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9997537 - 2¹⁵ = 9964769 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 7 ways as a sum of consecutive naturals, for example, 3714 + ... + 5812.

It is an arithmetic number, because the mean of its divisors is an integer number (1367100).

Almost surely, 2^9997537 is an apocalyptic number.

It is an amenable number.

9997537 is a deficient number, since it is larger than the sum of its proper divisors (939263).

9997537 is a wasteful number, since it uses less digits than its factorization.

9997537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543.

The product of its digits is 535815, while the sum is 49.

The square root of 9997537 is about 3161.8882016921. Note that the first 3 decimals coincide. The cubic root of 9997537 is about 215.4257796420.

The spelling of 9997537 in words is "nine million, nine hundred ninety-seven thousand, five hundred thirty-seven".