9978674 has 4 divisors (see below), whose sum is σ = 14968014. Its totient is φ = 4989336.

The previous prime is 9978659. The next prime is 9978719. The reversal of 9978674 is 4768799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4768799 = 7 ⋅681257.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 24649 = 3155^2 + 157^2 .

It is a d-powerful number, because it can be written as 9³ + 9³ + 7⁵ + 8 + 6⁴ + 7⁸ + 4¹¹ .

It is a Curzon number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494667 + ... + 2494670.

Almost surely, 2^9978674 is an apocalyptic number.

9978674 is a deficient number, since it is larger than the sum of its proper divisors (4989340).

9978674 is a wasteful number, since it uses less digits than its factorization.

9978674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989339.

The product of its digits is 762048, while the sum is 50.

The square root of 9978674 is about 3158.9039238318. The cubic root of 9978674 is about 215.2902084230.

The spelling of 9978674 in words is "nine million, nine hundred seventy-eight thousand, six hundred seventy-four".