9997678 has 4 divisors (see below), whose sum is σ = 14996520. Its totient is φ = 4998838.

The previous prime is 9997661. The next prime is 9997697. The reversal of 9997678 is 8767999.

9997678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499418 + ... + 2499421.

It is an arithmetic number, because the mean of its divisors is an integer number (3749130).

Almost surely, 2^9997678 is an apocalyptic number.

9997678 is a deficient number, since it is larger than the sum of its proper divisors (4998842).

9997678 is a wasteful number, since it uses less digits than its factorization.

9997678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998841.

The product of its digits is 1714608, while the sum is 55.

The square root of 9997678 is about 3161.9104984171. The cubic root of 9997678 is about 215.4267923879.

The spelling of 9997678 in words is "nine million, nine hundred ninety-seven thousand, six hundred seventy-eight".