9972097 has 4 divisors (see below), whose sum is σ = 10135636. Its totient is φ = 9808560.

The previous prime is 9972059. The next prime is 9972101. The reversal of 9972097 is 7902799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7902799 = 31 ⋅254929.

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 8473921 = 1224^2 + 2911^2 .

It is a cyclic number.

It is not a de Polignac number, because 9972097 - 2¹¹ = 9970049 is a prime.

It is a Duffinian number.

9972097 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9972007) 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, 81678 + ... + 81799.

It is an arithmetic number, because the mean of its divisors is an integer number (2533909).

Almost surely, 2^9972097 is an apocalyptic number.

It is an amenable number.

9972097 is a deficient number, since it is larger than the sum of its proper divisors (163539).

9972097 is a wasteful number, since it uses less digits than its factorization.

9972097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163538.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 9972097 is about 3157.8627265921. The cubic root of 9972097 is about 215.2428983661.

The spelling of 9972097 in words is "nine million, nine hundred seventy-two thousand, ninety-seven".