9973989 has 8 divisors (see below), whose sum is σ = 14776320. Its totient is φ = 6649308.

The previous prime is 9973981. The next prime is 9974021. The reversal of 9973989 is 9893799.

It is a happy number.

It is not a de Polignac number, because 9973989 - 2³ = 9973981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9973981) 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, 184677 + ... + 184730.

It is an arithmetic number, because the mean of its divisors is an integer number (1847040).

Almost surely, 2^9973989 is an apocalyptic number.

It is an amenable number.

9973989 is a deficient number, since it is larger than the sum of its proper divisors (4802331).

9973989 is a wasteful number, since it uses less digits than its factorization.

9973989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369416 (or 369410 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 9973989 is about 3158.1622820875. The cubic root of 9973989 is about 215.2565101407.

It can be divided in two parts, 99 and 73989, that added together give a cube (74088 = 42³).

The spelling of 9973989 in words is "nine million, nine hundred seventy-three thousand, nine hundred eighty-nine".