9972789 has 8 divisors (see below), whose sum is σ = 13580160. Its totient is φ = 6506976.

The previous prime is 9972779. The next prime is 9972803. The reversal of 9972789 is 9872799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9972789 - 2⁴ = 9972773 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35224 + ... + 35505.

It is an arithmetic number, because the mean of its divisors is an integer number (1697520).

Almost surely, 2^9972789 is an apocalyptic number.

It is an amenable number.

9972789 is a deficient number, since it is larger than the sum of its proper divisors (3607371).

9972789 is a wasteful number, since it uses less digits than its factorization.

9972789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70779.

The product of its digits is 571536, while the sum is 51.

The square root of 9972789 is about 3157.9722924687. The cubic root of 9972789 is about 215.2478770795.

The spelling of 9972789 in words is "nine million, nine hundred seventy-two thousand, seven hundred eighty-nine".