9797978 has 8 divisors (see below), whose sum is σ = 14839968. Its totient is φ = 4851324.

The previous prime is 9797959. The next prime is 9797993. The reversal of 9797978 is 8797979.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23576 + ... + 23987.

It is an arithmetic number, because the mean of its divisors is an integer number (1854996).

Almost surely, 2^9797978 is an apocalyptic number.

9797978 is a deficient number, since it is larger than the sum of its proper divisors (5041990).

9797978 is a wasteful number, since it uses less digits than its factorization.

9797978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47668.

The product of its digits is 2000376, while the sum is 56.

The square root of 9797978 is about 3130.1721997360. The cubic root of 9797978 is about 213.9827773137.

Subtracting from 9797978 its reverse (8797979), we obtain a palindrome (999999).

The spelling of 9797978 in words is "nine million, seven hundred ninety-seven thousand, nine hundred seventy-eight".