978119999 has 4 divisors (see below), whose sum is σ = 978392136. Its totient is φ = 977847864.

The previous prime is 978119983. The next prime is 978120001. The reversal of 978119999 is 999911879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 978119999 - 2⁴ = 978119983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978119969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130604 + ... + 137889.

It is an arithmetic number, because the mean of its divisors is an integer number (244598034).

Almost surely, 2^978119999 is an apocalyptic number.

978119999 is a deficient number, since it is larger than the sum of its proper divisors (272137).

978119999 is a wasteful number, since it uses less digits than its factorization.

978119999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272136.

The product of its digits is 3306744, while the sum is 62.

The square root of 978119999 is about 31274.9100558259. The cubic root of 978119999 is about 992.6528174448.

The spelling of 978119999 in words is "nine hundred seventy-eight million, one hundred nineteen thousand, nine hundred ninety-nine".