9997123623 has 8 divisors (see below), whose sum is σ = 13377620208. Its totient is φ = 6640688064.

The previous prime is 9997123613. The next prime is 9997123693. The reversal of 9997123623 is 3263217999.

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

It is not a de Polignac number, because 9997123623 - 2¹³ = 9997115431 is a prime.

It is a super-2 number, since 2×9997123623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997123613) 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, 6014286 + ... + 6015947.

It is an arithmetic number, because the mean of its divisors is an integer number (1672202526).

Almost surely, 2^9997123623 is an apocalyptic number.

9997123623 is a deficient number, since it is larger than the sum of its proper divisors (3380496585).

9997123623 is a wasteful number, since it uses less digits than its factorization.

9997123623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12030513.

The product of its digits is 1102248, while the sum is 51.

The square root of 9997123623 is about 99985.6170806582. The cubic root of 9997123623 is about 2154.2281046770.

The spelling of 9997123623 in words is "nine billion, nine hundred ninety-seven million, one hundred twenty-three thousand, six hundred twenty-three".