9978602 has 4 divisors (see below), whose sum is σ = 14967906. Its totient is φ = 4989300.

The previous prime is 9978601. The next prime is 9978607. The reversal of 9978602 is 2068799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2068799 = 47 ⋅44017.

It can be written as a sum of positive squares in only one way, i.e., 5812921 + 4165681 = 2411^2 + 2041^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9978602.

It is not an unprimeable number, because it can be changed into a prime (9978601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494649 + ... + 2494652.

Almost surely, 2^9978602 is an apocalyptic number.

9978602 is a deficient number, since it is larger than the sum of its proper divisors (4989304).

9978602 is a wasteful number, since it uses less digits than its factorization.

9978602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989303.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 9978602 is about 3158.8925274533. The cubic root of 9978602 is about 215.2896906210.

The spelling of 9978602 in words is "nine million, nine hundred seventy-eight thousand, six hundred two".