9079978 has 4 divisors (see below), whose sum is σ = 13619970. Its totient is φ = 4539988.

The previous prime is 9079969. The next prime is 9079979. The reversal of 9079978 is 8799709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8799709 = 479 ⋅18371.

It can be written as a sum of positive squares in only one way, i.e., 8982009 + 97969 = 2997^2 + 313^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9079979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2269993 + ... + 2269996.

Almost surely, 2^9079978 is an apocalyptic number.

9079978 is a deficient number, since it is larger than the sum of its proper divisors (4539992).

9079978 is a wasteful number, since it uses less digits than its factorization.

9079978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539991.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 9079978 is about 3013.3001841834. The cubic root of 9079978 is about 208.6227177747.

The spelling of 9079978 in words is "nine million, seventy-nine thousand, nine hundred seventy-eight".