9972923 has 4 divisors (see below), whose sum is σ = 9980880. Its totient is φ = 9964968.

The previous prime is 9972913. The next prime is 9972973. The reversal of 9972923 is 3292799.

9972923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3292799 = 79 ⋅41681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9972923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9972913) 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, 1640 + ... + 4757.

It is an arithmetic number, because the mean of its divisors is an integer number (2495220).

Almost surely, 2^9972923 is an apocalyptic number.

9972923 is a deficient number, since it is larger than the sum of its proper divisors (7957).

9972923 is a wasteful number, since it uses less digits than its factorization.

9972923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956.

The product of its digits is 61236, while the sum is 41.

The square root of 9972923 is about 3157.9935085430. The cubic root of 9972923 is about 215.2488411390.

Adding to 9972923 its sum of digits (41), we get a square (9972964 = 3158²).

The spelling of 9972923 in words is "nine million, nine hundred seventy-two thousand, nine hundred twenty-three".