9875978 has 8 divisors (see below), whose sum is σ = 16930272. Its totient is φ = 4232556.

The previous prime is 9875977. The next prime is 9875981. The reversal of 9875978 is 8795789.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9875977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352700 + ... + 352727.

It is an arithmetic number, because the mean of its divisors is an integer number (2116284).

Almost surely, 2^9875978 is an apocalyptic number.

9875978 is a deficient number, since it is larger than the sum of its proper divisors (7054294).

9875978 is a wasteful number, since it uses less digits than its factorization.

9875978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705436.

The product of its digits is 1270080, while the sum is 53.

The square root of 9875978 is about 3142.6068796463. The cubic root of 9875978 is about 214.5491037199.

The spelling of 9875978 in words is "nine million, eight hundred seventy-five thousand, nine hundred seventy-eight".