9972113 has 4 divisors (see below), whose sum is σ = 10048368. Its totient is φ = 9895860.

The previous prime is 9972103. The next prime is 9972119. The reversal of 9972113 is 3112799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3112799 = 311 ⋅10009.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9972113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9972113.

It is not an unprimeable number, because it can be changed into a prime (9972119) 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, 37931 + ... + 38192.

It is an arithmetic number, because the mean of its divisors is an integer number (2512092).

Almost surely, 2^9972113 is an apocalyptic number.

It is an amenable number.

9972113 is a deficient number, since it is larger than the sum of its proper divisors (76255).

9972113 is a wasteful number, since it uses less digits than its factorization.

9972113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76254.

The product of its digits is 3402, while the sum is 32.

The square root of 9972113 is about 3157.8652599501. The cubic root of 9972113 is about 215.2430134834.

The spelling of 9972113 in words is "nine million, nine hundred seventy-two thousand, one hundred thirteen".