9973165723 has 4 divisors (see below), whose sum is σ = 10406781648. Its totient is φ = 9539549800.

The previous prime is 9973165717. The next prime is 9973165729. The reversal of 9973165723 is 3275613799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3275613799 = 541 ⋅6054739.

It is an interprime number because it is at equal distance from previous prime (9973165717) and next prime (9973165729).

It is a cyclic number.

It is not a de Polignac number, because 9973165723 - 2¹⁷ = 9973034651 is a prime.

It is a super-2 number, since 2×9973165723² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9973165729) 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, 216807928 + ... + 216807973.

It is an arithmetic number, because the mean of its divisors is an integer number (2601695412).

Almost surely, 2^9973165723 is an apocalyptic number.

9973165723 is a deficient number, since it is larger than the sum of its proper divisors (433615925).

9973165723 is a wasteful number, since it uses less digits than its factorization.

9973165723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433615924.

The product of its digits is 2143260, while the sum is 52.

The square root of 9973165723 is about 99865.7384842269. The cubic root of 9973165723 is about 2152.5058738137.

The spelling of 9973165723 in words is "nine billion, nine hundred seventy-three million, one hundred sixty-five thousand, seven hundred twenty-three".