9577978 has 4 divisors (see below), whose sum is σ = 14366970. Its totient is φ = 4788988.

The previous prime is 9577973. The next prime is 9577979. The reversal of 9577978 is 8797759.

9577978 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, and also an emirpimes, since its reverse is a distinct semiprime: 8797759 = 29 ⋅303371.

It can be written as a sum of positive squares in only one way, i.e., 6017209 + 3560769 = 2453^2 + 1887^2 .

It is not an unprimeable number, because it can be changed into a prime (9577973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2394493 + ... + 2394496.

Almost surely, 2^9577978 is an apocalyptic number.

9577978 is a deficient number, since it is larger than the sum of its proper divisors (4788992).

9577978 is a wasteful number, since it uses less digits than its factorization.

9577978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788991.

The product of its digits is 1111320, while the sum is 52.

The square root of 9577978 is about 3094.8308515975. The cubic root of 9577978 is about 212.3690764466.

The spelling of 9577978 in words is "nine million, five hundred seventy-seven thousand, nine hundred seventy-eight".