9972423 has 16 divisors (see below), whose sum is σ = 14825440. Its totient is φ = 6625152.

The previous prime is 9972401. The next prime is 9972439. The reversal of 9972423 is 3242799.

It is not a de Polignac number, because 9972423 - 2²⁰ = 8923847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11265 + ... + 12117.

It is an arithmetic number, because the mean of its divisors is an integer number (926590).

Almost surely, 2^9972423 is an apocalyptic number.

9972423 is a deficient number, since it is larger than the sum of its proper divisors (4853017).

9972423 is a wasteful number, since it uses less digits than its factorization.

9972423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295 (or 1289 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 9972423 is about 3157.9143433602. The cubic root of 9972423 is about 215.2452438581.

The spelling of 9972423 in words is "nine million, nine hundred seventy-two thousand, four hundred twenty-three".