9973687 has 4 divisors (see below), whose sum is σ = 10122616. Its totient is φ = 9824760.

The previous prime is 9973673. The next prime is 9973751. The reversal of 9973687 is 7863799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7863799 = 131 ⋅60029.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9973687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9973687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9973627) 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, 74364 + ... + 74497.

It is an arithmetic number, because the mean of its divisors is an integer number (2530654).

Almost surely, 2^9973687 is an apocalyptic number.

9973687 is a deficient number, since it is larger than the sum of its proper divisors (148929).

9973687 is a wasteful number, since it uses less digits than its factorization.

9973687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148928.

The product of its digits is 571536, while the sum is 49.

The square root of 9973687 is about 3158.1144691097. The cubic root of 9973687 is about 215.2543375522.

The spelling of 9973687 in words is "nine million, nine hundred seventy-three thousand, six hundred eighty-seven".