9972394 has 4 divisors (see below), whose sum is σ = 14958594. Its totient is φ = 4986196.

The previous prime is 9972383. The next prime is 9972401. The reversal of 9972394 is 4932799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4932799 = 19 ⋅259621.

It can be written as a sum of positive squares in only one way, i.e., 5405625 + 4566769 = 2325^2 + 2137^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9972394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493097 + ... + 2493100.

Almost surely, 2^9972394 is an apocalyptic number.

9972394 is a deficient number, since it is larger than the sum of its proper divisors (4986200).

9972394 is a wasteful number, since it uses less digits than its factorization.

9972394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986199.

The product of its digits is 122472, while the sum is 43.

The square root of 9972394 is about 3157.9097517187. The cubic root of 9972394 is about 215.2450352121.

The spelling of 9972394 in words is "nine million, nine hundred seventy-two thousand, three hundred ninety-four".