9978319 has 8 divisors (see below), whose sum is σ = 10922912. Its totient is φ = 9059040.

The previous prime is 9978313. The next prime is 9978323. The reversal of 9978319 is 9138799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9978319 - 2⁷ = 9978191 is a prime.

It is a super-2 number, since 2×9978319² = 199133700131522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5499 + ... + 7084.

It is an arithmetic number, because the mean of its divisors is an integer number (1365364).

Almost surely, 2^9978319 is an apocalyptic number.

9978319 is a deficient number, since it is larger than the sum of its proper divisors (944593).

9978319 is a wasteful number, since it uses less digits than its factorization.

9978319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12657.

The product of its digits is 122472, while the sum is 46.

The square root of 9978319 is about 3158.8477329558. The cubic root of 9978319 is about 215.2876553473.

It can be divided in two parts, 997 and 8319, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 9978319 in words is "nine million, nine hundred seventy-eight thousand, three hundred nineteen".