9699978 has 32 divisors (see below), whose sum is σ = 20295360. Its totient is φ = 3086720.

The previous prime is 9699973. The next prime is 9700003. The reversal of 9699978 is 8799969.

It is not an unprimeable number, because it can be changed into a prime (9699973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18358 + ... + 18878.

It is an arithmetic number, because the mean of its divisors is an integer number (634230).

Almost surely, 2^9699978 is an apocalyptic number.

9699978 is an abundant number, since it is smaller than the sum of its proper divisors (10595382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9699978 is a wasteful number, since it uses less digits than its factorization.

9699978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its digits is 2204496, while the sum is 57.

The square root of 9699978 is about 3114.4787685903. The cubic root of 9699978 is about 213.2669623176.

Subtracting from 9699978 its reverse (8799969), we obtain a palindrome (900009).

The spelling of 9699978 in words is "nine million, six hundred ninety-nine thousand, nine hundred seventy-eight".