9973863 has 6 divisors (see below), whose sum is σ = 14406704. Its totient is φ = 6649236.

The previous prime is 9973853. The next prime is 9973871. The reversal of 9973863 is 3683799.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-9973863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9973813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 554095 + ... + 554112.

Almost surely, 2^9973863 is an apocalyptic number.

9973863 is a deficient number, since it is larger than the sum of its proper divisors (4432841).

9973863 is a wasteful number, since it uses less digits than its factorization.

9973863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108213 (or 1108210 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 9973863 is about 3158.1423337146. The cubic root of 9973863 is about 215.2556037018.

Subtracting from 9973863 its reverse (3683799), we obtain a square (6290064 = 2508²).

The spelling of 9973863 in words is "nine million, nine hundred seventy-three thousand, eight hundred sixty-three".